British English and American English: Spelling Differences
British and American variants of spelling are used internationally in various fields. However, language learners should stick to the spelling variant that corresponds to the variant of English that they are studying. Be consistent in your choice: if you write "centre" in one sentence and "center" in another, it might be regarded as a mistake, especially in examination papers. The chart below gives examples of spelling differences between BrE and AmE. Some derivative words are also given in the chart; some of them are the same in British and American English, others are not. Note that British spelling variants often exist as secondary spelling variants in American English. You can check British and American spelling in online dictionaries, for example, Cambridge Advanced Learner's Dictionary and Merriam-Webster Online.
British English | American English |
aero | air, aero |
aeroplane, aerodrome, airport | airplane, airdrome, airport |
aeronaut, aerospace, aerosol, aerial | aeronaut, aerospace, aerosol, aerial |
ae | e, ae |
anaemia | anemia |
anaesthetic | anesthetic, anaesthetic |
aesthete, aesthetics | aesthete, aesthetics; esthete, esthetics |
archaeology, archaeologist | archaeology, archaeologist; archeology, archeologist |
encyclopaedia, encyclopedia | encyclopedia |
gynaecology, gynaecologist | gynecology, gynecologist |
haemoglobin, hemoglobin | hemoglobin |
haemophilia, hemophilia | hemophilia |
haemorrhage, hemorrhage | hemorrhage |
leukaemia | leukemia |
medieval, mediaeval | medieval |
orthopaedic, orthopedic | orthopedic |
paediatrician, pediatrician | pediatrician |
Aesop, Caesar | Aesop, Caesar |
oe | e |
diarrhoea, diarrhea | diarrhea |
foetus, fetus, foetal, fetal | fetus, fetal |
homeopathy, homoeopathy | homeopathy |
oesophagus, esophagus | esophagus |
oestrogen, estrogen | estrogen |
Oedipus, phoenix | Oedipus, phoenix |
ction, xion | ction |
connection, connexion | connection |
inflection, inflexion | inflection |
reflection, reflexion | reflection |
complexion; crucifixion | complexion; crucifixion |
gue | gue, g |
analogue | analogue, analog |
catalogue | catalogue, catalog |
demagogue | demagogue, demagog |
dialogue | dialogue, dialog |
monologue | monologue, monolog |
pedagogue | pedagogue, pedagog |
prologue | prologue, prolog |
ize, ise | ize |
apologize, apologise | apologize |
characterize, characterise | characterize |
memorize, memorise | memorize |
normalize, normalise, normalization, normalisation | normalize, normalization |
organize, organise, organization, organisation | organize, organization |
realize, realise, realization, realisation | realize, realization |
recognize, recognise | recognize |
specialize, specialise | specialize |
symbolize, symbolise | symbolize |
terrorize, terrorise | terrorize |
vaporize, vaporise | vaporize |
yse | yze |
analyse, analysed, analysing; analysis, analyst | analyze, analyzed, analyzing; analysis, analyst |
paralyse, paralysed, paralysing; paralysis | paralyze, paralyzed, paralyzing; paralysis |
l, ll | l |
cancel, cancelled, cancelling, canceller, cancellation | cancel, canceled, canceling, canceler, cancellation |
counsel, counselled, counselling, counsellor | counsel, counseled, counseling, counselor |
dial, dialled, dialling, dialler | dial, dialed, dialing, dialer |
equal, equalled, equalling; equality | equal, equaled, equaling; equality |
fuel, fuelled, fuelling | fuel, fueled, fueling |
initial, initialled, inialling | initial, initialed, inialing |
jewel, jeweller, jewellery; jewelled | jewel, jeweler, jewelry; jeweled |
label, labelled, labelling, labeller | label, labeled, labeling, labeler |
level, levelled, levelling | level, leveled, leveling |
libel, libelled, libelling, libellant, libellee, libeller, libellous | libel, libeled, libeling, libelant, libelee, libeler, libelous |
marvel, marvelled, marvellous, marvellously | marvel, marveled, marvelous, marvelously |
parallel, paralleled, paralleling, unparalleled, parallelogram | parallel, paralleled, paralleling, unparalleled, parallelogram |
quarrel, quarrelled, quarrelling, quarreller | quarrel, quarreled, quarreling, quarreler |
scandal, scandalous | scandal, scandalous |
signal, signalled, signalling, signaller | signal, signaled, signaling, signaler |
travel, travelled, travelling, traveller | travel, traveled, traveling, traveler |
wool, woollen, woolly | wool, woolen, woolly, wooly |
l, ll | ll |
distil, distilled, distilling, distillation, distillery | distill, distilled, distilling, distillation, distillery |
enrol, enrolled, enrolling, enroller, enrolment | enroll, enrolled, enrolling, enroller, enrollment |
fulfil, fulfilled, fulfilling, fulfilment | fulfill, fulfilled, fulfilling, fulfillment |
install, instal, installed, installation, installer, instalment | install, installed, installation, installer, installment |
instil, instilled, instillation, instillator | instill, instilled, instillation, instillator |
skill, skilful, skilfully, skilled | skill, skillful, skillfully, skilled |
will, wilful, wilfully | will, willful, willfully |
mme | m, mme |
gramme, gram, kilogramme, kilogram | gram, kilogram |
to programme, programmed, programming; programmer; a programme | to program, programmed, programed, programming, programing; programmer; a program |
our | or |
armour, armoury, armoured | armor, armory, armored |
behaviour, behavioural | behavior, behavioral |
clamour, clamorous | clamor, clamorous |
colour, coloured, colourful | color, colored, colorful |
favour, favourite, favourable | favor, favorite, favorable |
flavour, flavouring | flavor, flavoring |
glamour, glamorous, glamourous | glamour, glamor, glamorous, glamourous |
honour, honoured, honourable, honorary | honor, honored, honorable, honorary |
humour, good-humoured, humourless, humorous, humorist | humor, good-humored, humorless, humorous, humorist |
labour, laboured, labouring, labourer, laborious | labor, labored, laboring, laborer, laborious |
neighbour, neighbourhood | neighbor, neighborhood |
odour, odourless, deodorant | odor, odorless, deodorant |
parlour | parlor |
rumour | rumor |
saviour | savior |
savour, savoury | savor, savory |
splendour | splendor |
tumour | tumor |
valour, valorous | valor, valorous |
vapour, vaporous, vapourous | vapor, vaporous |
vigour, vigorous | vigor, vigorous |
re | er |
cadastre | cadastre, cadaster |
calibre | caliber |
centre, centres, central | center, centers, central |
to centre, centred, centring | to center, centered, centering |
centrepiece | centerpiece |
fibre, fibrous | fiber, fibrous |
litre | liter |
lustre, lustrous, illustrious | luster, lustrous, illustrious |
macabre | macabre, macaber |
manoeuvre, manoeuvres, manoeuvrability | maneuver, maneuvers, maneuverability |
to manoeuvre, manoeuvres, manoeuvred, manoeuvring | to maneuver, maneuvers, maneuvered, maneuvering |
meagre | meager |
metre, metric, centimetre, kilometre | meter, metric, centimeter, kilometer |
meter | meter |
sceptre | scepter |
sombre | somber |
theatre, theatrical | theater, theatrical |
se, ce | se, ce |
defence | defense |
to license, a licence | to license, a license |
offence | offense |
pretence | pretense |
to practise, practised, practising, practiser; practice (noun) | to practice, practiced, practicing, practicer; practice (noun) |
Miscellaneous | Miscellaneous |
aluminium | aluminum |
cheque | check |
cigarette | cigarette, cigaret |
cosy | cozy |
disc, disk | disk, disc |
draught | draft |
grey | gray |
kerb, kerbstone | curb, curbstone |
maths | math |
matt | matte |
mould; mouldy | mold; moldy |
per cent | percent |
plough | plow |
pyjamas | pajamas |
sceptic, sceptical, scepticism | skeptic, skeptical, skepticism |
smoulder | smolder |
speciality | specialty |
storey, storeys; two-storey, two-storeyed | story, stories; two-story, two-storied |
tyre | tire |
yoghurt, yogurt, yoghourt | yogurt, yoghurt, yoghourt |
Note: Regular and irregular verbs
These verbs can be regular or irregular in BrE and AmE: burn, dream, kneel, lean, leap, learn, misspell, smell, spell, spill, spoil. Usually, they are regular in American English, i.e., they form the Simple Past and the Past Participle by adding the ending ED.