suffix
top of ...; head of ...
Attaches to nouns to mean the top or head of that thing. Often used in titles like 番頭 (head clerk) or 組頭 (group leader).
彼はこの町の若者頭だ。
He is the head of the young people in this town.
番頭が店の切り盛りをしている。
The head clerk manages the shop.
suffix
the moment that ...
Attaches to the -masu stem of a verb to mean 'at the moment of doing' or 'just as one does'. Often used in set phrases like 振り向き頭に (just as one turned around).
彼は立ち上がり頭にめまいがした。
He felt dizzy the moment he stood up.
振り向き頭に誰かとぶつかった。
I bumped into someone just as I turned around.