feijoa vs pineapple guava

feijoa and pineapple guava both are nouns.

Word	Noun	Adjective	Verb	Adverb
feijoa	Yes	No	No	No
pineapple guava	Yes	No	No	No

As nouns, feijoa and pineapple guava are synonyms defined as:

feijoa and pineapple guava: dark-green kiwi-sized tropical fruit with white flesh; used chiefly for jellies and preserves

feijoa (noun)	pineapple guava (noun)
dark-green kiwi-sized tropical fruit with white flesh; used chiefly for jellies and preserves	dark-green kiwi-sized tropical fruit with white flesh; used chiefly for jellies and preserves
South American shrub having edible greenish plumlike fruit