plumbing fixture vs tap

plumbing fixture and tap both are nouns.

Word	Noun	Adjective	Verb	Adverb
plumbing fixture	Yes	No	No	No
tap	Yes	No	Yes	No

As nouns, tap is a hyponym of plumbing fixture; that is, tap is a word with a more specific, narrower meaning than plumbing fixture:

plumbing fixture: a fixture for the distribution and use of water in a building
tap: a faucet for drawing water from a pipe or cask

Other hyponyms of plumbing fixture include fount, fountain, shower, sink, can, commode, crapper, pot, potty, stool, throne, toilet, urinal, hydrant, water faucet, water tap.

plumbing fixture (noun)	tap (noun)
a fixture for the distribution and use of water in a building	a light touch or stroke
	the act of tapping a telephone or telegraph line to get information
	a faucet for drawing water from a pipe or cask
	a plug for a bunghole in a cask
	a tool for cutting female (internal) screw threads
	a small metal plate that attaches to the toe or heel of a shoe (as in tap dancing)
	the sound made by a gentle blow
	a gentle blow

plumbing fixture (verb)	tap (verb)
	make a solicitation or entreaty for something; request urgently or persistently
	draw from; make good use of
	strike lightly
	cut a female screw thread with a tap
	pierce in order to draw a liquid from
	walk with a tapping sound
	dance and make rhythmic clicking sounds by means of metal plates nailed to the sole of the dance shoes
	draw (liquor) from a tap
	tap a telephone or telegraph wire to get information
	make light, repeated taps on a surface
	draw from or dip into to get something
	furnish with a tap or spout, so as to be able to draw liquid from it