potty chair vs potty

potty chair and potty both are nouns.

Word	Noun	Adjective	Verb	Adverb
potty chair	Yes	No	No	No
potty	Yes	Yes	No	No

As nouns, potty is a hypernym of potty chair; that is, potty is a word with a broader meaning than potty chair:

Other hypernyms of potty chair include can, commode, crapper, pot, stool, throne, toilet.

potty chair (noun)	potty (noun)
toilet consisting of a small seat used by young children	a receptacle for urination or defecation in the bedroom
	a plumbing fixture for defecation and urination

potty chair (adjective)	potty (adjective)
	slightly intoxicated
	marked by foolish or unreasoning fondness
	(British informal) trivial