commode vs plumbing fixture

commode and plumbing fixture both are nouns.

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

As nouns, plumbing fixture is a hypernym of commode; that is, plumbing fixture is a word with a broader meaning than commode:

commode: a plumbing fixture for defecation and urination
plumbing fixture: a fixture for the distribution and use of water in a building

commode (noun)	plumbing fixture (noun)
a plumbing fixture for defecation and urination	a fixture for the distribution and use of water in a building
a tall elegant chest of drawers