ADJ

hot, hot-water
cold, cold-water
mixer
dripping, running
the sound of a dripping tap
leaky
bath, bathroom, kitchen

VERB + TAP

turn (off/on)
Turn the tap clockwise
run
You have to run the tap a long time before the hot water comes

TAP + VERB

drip, run
Someone has left the tap running
leak

TAP + NOUN

water
washer

PREP

on ~
The pub has two sorts of beer on tap (= in a barrel with a tap on it)
(figurative)
We have this sort of information on tap (= available to be used at any time)

ADJ

gentle, light, little
sharp

VERB + TAP

give sb/sth

PREP

~ at
There was a little tap at the door
~ on
He gave her a tap on the shoulder