moustache; mustache; whiskers (on a cat, etc.); feelers (on an insect, etc.); shadow (on a candlestick chart)
grey appearance after shaving one's beard; five o'clock shadow; stubble; use of blue pigment to indicate a character has shaved
whiskers; sideburns; sideboards
bristly beard; bristly mustache; tiger whiskers
balance spring; hairspring