All dressed up—dressed formally; dressed in one’s best clothes.
Afterall vs After all
After all is always two words.
Annoy vs Vex vs Irk vs Bother
Annoy, vex, irk and bother all mean to disturb and nervously upset a person.
Aforementioned vs Aforesaid
Aforementioned and aforesaid, meaning stated previously, should be restricted to legal writing.
Annotate vs Gloss
Annotate, gloss and their corresponding nouns annotation, gloss mean, as verbs, to add or append comment, or as nouns, an added or appended comment intended to be helpful in interpreting a passage or text.
All day and every day vs All the days of one’s life
All day and every day—during the whole of one day and for a number of days afterwards.
Affluent vs Effluent
Affluent refers to the rich.
Annex vs Extension vs Wing vs Ell
Annex, extension, wing and ell designate an addition to a main (and, often, the original) building.
All but vs Anything but
All but—almost; nearly.
All at once vs At once
All at once—suddenly and abruptly.
Afflict vs Inflict
Afflict means to cause suffering for someone or something.
Animality vs Animalism
Animality and animalism are not always clearly distinguished when they are used to denote animal nature, character, or springs of action in a man or in men.