a/per head
bang/knock/hit (someone’s) heads together
be/get in over your head
be off your head
be out of your head
cannot make head nor/or tail of something
a clear head
come/bring something to a head
do someone’s head in
from head to toe
get up/build up/work up a head of steam
get it into/through your head (that)
get someone/something out of your head
get/take it into your head to do something
get your head round something
give someone head
give someone their head
go over someone’s head
go to someone’s head
have a big/swollen head
have a (good) head for heights
have a (good) head for figures/business etc
have a good head on your shoulders
have your head in the clouds
have your head (screwed) on right
head and shoulders above the rest/others
head of hair
head over heels
heads up
heads will roll
keep your head above water
keep your head down
laugh/shout/scream your head off
like banging/hitting your head against a brick wall
need your head examined
on your (own) head be it
put something out of your head
put your heads together
stand/turn something on its head