Synonyms for hair

noun

1. Threadlike growth

   locks, tresses, wig, moustache, whiskers, eyebrow, eyelash, thatch, sideburn, down, tress, wool, shock, mane, filament, fluff; see also beard, fur.

2. One threadlike growth

   whisker, cilium, bristle, vibrissa, striga, villus; see also fiber 1, thread.

3. Anything suggesting the thickness of a hair

   filament, strand, thread, fiber, a hairbreadth, a narrow margin, whisker, nose, hair trigger, hairspring, splinter, shaving, sliver; see also bit 3.

get in one's hair*

have by the short hairs*

let one's hair down*

make one's hair stand on end

split hairs

to a hair