I’ve also noticed tyroid is spelt differently, as well as learnt is learned!

But never mind the spellings, what about the words themselves

Fringes are bangs

Bags are purses

CVs are resumes

Bonnets are Hoods

Boots are Trunks

Petrol is Gas

pavements are sidewalks

the list is endless!

colour; color

favourite; favorite

catalogue; catalog

memorize; memorise

analyze; analyse

skilful; skillful

travelling; traveling

theatre; theater

centre; center

Here’s a good page that summarizes the types of differences:

http://www2.gsu.edu/~wwwesl/egw/jones/differences.htm

behavior/behaviour

capitalize/capitalise

visualize/visualise

vitalize/vitalise

verbalize/verbalise

memorialize/memorialise

spiritualize/spiritualise

tenderize/tenderise

words that end in “ize” in U.S…. the Brits end with “ise”

colour,color

and then realize/realise

favorite-favourite

gray-grey

color-colour