a lot (not alot)

All-America, All-American (with the hyphen)

all right (not alright)

any more (not anymore)

barbecue (not barbeque)

dietitian (not dietician)

email (not capitalized, no hyphen—an exception to AP style)

exclusivity (not exclusativity)

gray (not grey, unless you’re writing for a British audience)

livable (not liveable)

nowadays (not nowdays)

online (not on-line)

percent (not per cent)

preventive (not preventative)

teenager, teenage (not teen-ager or teen-age)

toward (not towards)

upward (not upwards)

Web,website, webmaster