pome vs apple

pome and apple both are nouns.

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

As nouns, apple is a hyponym of pome; that is, apple 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
apple: fruit with red or yellow or green skin and sweet to tart crisp whitish flesh

Other hyponyms of pome include pear, quince.

pome (noun)	apple (noun)
a fleshy fruit (apple or pear or related fruits) having seed chambers and an outer fleshy part	fruit with red or yellow or green skin and sweet to tart crisp whitish flesh
	native Eurasian tree widely cultivated in many varieties for its firm rounded edible fruits