• a fruit consisting of a hard or tough shell around an edible kernel

• a small flat piece of metal or other material, typically square or hexagonal, with a threaded hole through it for screwing on to a bolt as a fastener

• a person who is extremely or excessively interested in or enthusiastic about a specified thing

Synonyms: enthusiast, fan, fanatic, addict, devotee, aficionado

• a person who is very foolish or irrational

Synonyms: crank, lunatic, maniac

• a person's head

Synonyms: head, skull, cranium

• a man's testicles

• butt (someone) with one's head

• gather nuts

• the sky goddess, thought to swallow the sun at night and give birth to it in the morning

• (in the UK) National Union of Teachers