feijoa vs feijoa bush

feijoa and feijoa bush both are nouns.

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

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

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

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