Step-by-step explanation:
On the left -USA On the right- UK
- Color-Colour
- Gray-Grey
- Flavor-Flavour
- Behavior-Behaviour
- Humor-Humour
- Harbor-Harbour
- Honor-Honour
- Labor-Labour
- Neighbor-Neighbour
- Rumor-Rumour
- Splendor-Splendour
- Apologize-Apologise
- Organize-Organise
- Recognize-Recognise
- Analyze-Analyse
- Breathalyze-Breathalyse
- Paralyze-Paralyse
- Traveled-Travelled
- Travellng-Travelling
- Traveler-Traveller
[Got some more]
- leukemia-leukaemia
- maneuver-manoeuvre
- estrogen-oestrogen
- pediatric-paediatric
- defense-defence
- license-licence
- offense-offence
- analog\analogue-analogue
- pretense-pretence
- catalog\catalogue-catalogue
- dialog\dialogue-dialogue
That is all the words I could come up with.
Total:32 words of american and british english which have different spelling but are similar in meaning.