Some differences in spelling between American and Standard English

1 ou is spelt as o in American English

e.g. color (colour), favor (favour), favorite (favourite)

2 ph is rendered f in American English

e.g. Foto (photo), sulfur (sulphur)

3 ll is spelt as l in American English

e.g. Traveling (travelling)

4 ae is spelt as e in American English

e.g. pediatrician (paediatrician),

5 tre is spelt as ter in AmericanEnglish

e.g. center (centre), meter (metre)

[Words in brackets are Standard English.]