apple vs pome

apple and pome both are nouns.

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

As nouns, pome is a hypernym of apple; that is, pome is a word with a broader meaning than apple:

apple: fruit with red or yellow or green skin and sweet to tart crisp whitish flesh
pome: a fleshy fruit (apple or pear or related fruits) having seed chambers and an outer fleshy part

Other hypernyms of apple include edible fruit, false fruit.

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