A 100s 360 degrees a / an A.D. ala AM / PM abject able to about absorbtion abstruse / obtuse academia acapella, a capella accede / exceed accent marks access accessory accept / except accidently accurate / precise acronyms and apostrophes acrossed actionable / doable actual fact / actually ad / add ad nauseum addicting
What do these words have in common? These and O So Many more are common usage errors covered by Common Errors in English Usage 2nd Edition by Paul Brians. If you don’t already have a well-worn copy (or a bright, shiny Kindle edition) well… what’s wrong with you? That’s no way to live a life. Come on.
But if you really truly don’t already own one and must check something right NOW, go old school, back to the original website: Common Errors in English Usage.