頭

Dentistry

cusp (of a tooth)

Music

notehead

head of an organizational section; head of an organisational section

roadside; wayside

Law

summons; subpoena

beginning of the year

としがしら only

the oldest person

Anatomy

pharynx

something in the shape of a dragon's head (esp. a helmet crest)

first part of a word

fish served whole (complete with head and tail)

blind man

masseur (usu. blind)

front; forehead

Anatomy

larynx

lion mask

Word usually written using kana alone

Japanese deer fern (Blechnum nipponicum)

back of the head; occiput

leader of a (large) group

large decorative black flagpole tassel made from tail hair (of a yak, horse, ox, etc.) or dyed hemp

Word usually written using kana alone

puffbird (any bird of family Bucconidae)

Sumo

first makushita rikishi listed on the banzuke

beginning; outset; opening; start

Surgery

craniotomy

mechanical brain; computer

burial mound

head with grey hair (gray); grey head

electronic brain

beautiful well-proportioned woman (body 8 times longer than head)

snakeheads; Chinese criminal gangs, esp. for smuggling Chinese immigrants