pome vs quince

pome and quince both are nouns.

Word	Noun	Adjective	Verb	Adverb
pome	Yes	No	No	No
quince	Yes	No	No	No

As nouns, quince is a hyponym of pome; that is, quince is a word with a more specific, narrower meaning than pome:

pome: a fleshy fruit (apple or pear or related fruits) having seed chambers and an outer fleshy part
quince: aromatic acid-tasting pear-shaped fruit used in preserves

Other hyponyms of pome include apple, pear.

pome (noun)	quince (noun)
a fleshy fruit (apple or pear or related fruits) having seed chambers and an outer fleshy part	aromatic acid-tasting pear-shaped fruit used in preserves
	small Asian tree with pinkish flowers and pear-shaped fruit; widely cultivated