tomato vs love apple

tomato and love apple both are nouns.

Word	Noun	Adjective	Verb	Adverb
tomato	Yes	No	No	No
love apple	Yes	No	No	No

As nouns, tomato and love apple are synonyms defined as:

tomato and love apple: native to South America; widely cultivated in many varieties

Other synonyms of tomato include Lycopersicon esculentum, tomato plant.

tomato (noun)	love apple (noun)
mildly acid red or yellow pulpy fruit eaten as a vegetable	native to South America; widely cultivated in many varieties
native to South America; widely cultivated in many varieties