Having a head like that of a nail. / Formed like the heads of nails; said of ornamental marks on cloth and on certain kinds of mouldings (dogtooth).

addlepated

Having a thick head like a club (the weapon).

Having good intellectual powers: sagacious.

Having two heads. / (numismatics) Of a coin, having a head on both sides, especially when counterfeited by being constructed from two separate coins.

simple past tense and past participle of double-head

Having gray hair, especially from age

Having a bird's head, especially of a mythological figure.

stupid; mentally dull

Having three heads. / (rail transport) Of a train, hauled by three locomotives.