British/American
-our/-or
Unstressed syllables, AmE tends to spell -or instead of -our.
| BrE |
AmE |
| armour |
armor |
| behaviour |
behavior |
| colour |
color |
| endeavour |
endeavor |
| favour |
favor |
| flavour |
flavor |
| glamour |
glamor, glamour |
| harbour |
harbor |
| honour |
honor |
| humour |
humor |
| labour |
labor |
| neighbour |
neighbor |
| rigour |
rigor |
| rumour |
rumor |
| saviour |
savior, saviour |
| vigour |
vigor |
-re/-er
| BrE |
AmE |
| centre |
center |
| fibre |
fiber |
| litre |
liter |
| metre |
meter |
| sabre |
saber |
| spectre |
specter |
| theatre |
theater |
Special cases
| BrE |
AmE |
| acre |
acre |
| cadre |
cadre |
| genre |
genre |
| lucre |
lucre |
| massacre |
massacre |
| mediocre |
mediocre |
| ogre |
ogre |
| timbre |
timbre |
-l/-ll
Unstressed syllables
| Base |
BrE |
AmE |
| jewel |
jeweller |
jeweler |
| travel |
traveller, travelled, travelling |
traveller, traveled, traveling |
| wool |
woollen |
woolen |
Stressed syllables
| BrE |
AmE |
| appal |
appall |
| enrol |
enroll |
| distil |
distill |
| fulfil |
fulfill |
| skilful |
skillful |
Special cases
| BrE |
AmE |
| install |
install |
| expel |
expel |
| repel |
repel |
| until |
until |
-ise/-ize
| BrE |
AmE |
| apologise |
apologize |
|
authorize |
|
characterize |
|
emphasize |
|
minimize |
|
organize |
|
recognize |
|
specialize |
|
stabilize |
Special cases
| BrE |
AmE |
|
advertise |
|
advise |
|
arise |
|
chastise |
|
exercise |
|
revise |
|
rise |
|
supervise |
|
surprise |
|
televise |
-yse/-yze
| BrE |
AmE |
|
analyze |
|
breathalyze |
|
paralyze |
ae, oe/e
| BrE |
AmE |
| paediatrician |
pediatrician |
| paedophile |
pedophile |
| aesthetic |
esthetic |
| encyclopaedia, encyclopedia |
encyclopedia |
Special cases
Others