beanie / hat, cap / bonnet (for baby) / a knitted hat, usually woollen / cup (of bra)

(idiomatic) tomayto, tomahto; same difference; six of one, half a dozen of the other

Alternative form of bonnet blanc, blanc bonnet

dunce cap, dunce hat (conical hat one pupil is forced to wear to indicate he is a dunce) / donkey ears

(idiomatic) bigwig (a person of consequence)

(historical) a French revolutionary during the French Revolution / (historical, by extension) any revolutionary

plural of bonnet rouge

Phrygian cap, liberty cap

nightcap (clothing) / wet blanket; killjoy

(literary) to nod in agreement, to nod in approval, to approve