• 毛け — hair / fur
• 毛布もうふ — blanket
• 毛糸けいと — wool yarn
• 羽毛うもう — feathers / plumage
• 脱毛だつもう — hair removal
• 毛頭もうとう — not in the least / not at all
• 不毛ふもう — barren / unproductive
• 毛深けぶかい — hairy

Commonly used in biology, grooming, and clothing. It can also appear in abstract uses such as describing tiny amounts or small signs of something.