feijoa bush vs feijoa

feijoa bush and feijoa both are nouns.

Word	Noun	Adjective	Verb	Adverb
feijoa bush	Yes	No	No	No
feijoa	Yes	No	No	No

As nouns, feijoa bush and feijoa are synonyms defined as:

feijoa bush and feijoa: South American shrub having edible greenish plumlike fruit

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