potty chair vs commode

potty chair and commode both are nouns.

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

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

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

potty chair (noun)	commode (noun)
toilet consisting of a small seat used by young children	a plumbing fixture for defecation and urination
	a tall elegant chest of drawers