papaia vs melon tree

papaia and melon tree both are nouns.

Word	Noun	Adjective	Verb	Adverb
papaia	Yes	No	No	No
melon tree	Yes	No	No	No

As nouns, papaia and melon tree are synonyms defined as:

papaia and melon tree: tropical American shrub or small tree having huge deeply palmately cleft leaves and large oblong yellow fruit

Other synonyms of papaia include Carica papaya, papaya, papaya tree, pawpaw.

papaia (noun)	melon tree (noun)
tropical American shrub or small tree having huge deeply palmately cleft leaves and large oblong yellow fruit	tropical American shrub or small tree having huge deeply palmately cleft leaves and large oblong yellow fruit