Allowed vs. Aloud
Allude vs. Elude
Illusion vs. Allusion
Allusive vs. Elusive
Aloud vs. Allowed
Altar vs. Alter
Although vs. Though
Alumnus vs. Alumni
Ambiguous vs. Ambivalent
Amend vs. Emend
Among vs. Between
Amoral vs. Immoral
Amount vs. Number
Amuse vs. Bemuse
Anecdote vs. Antidote
Angel vs. Angle
Ant vs. Aunt
Ante vs. Anti
Eager vs. Anxious
Appraise vs. Apprise