papaya tree vs Carica papaya

papaya tree and Carica papaya both are nouns.

Word	Noun	Adjective	Verb	Adverb
papaya tree	Yes	No	No	No
Carica papaya	Yes	No	No	No

As nouns, papaya tree and Carica papaya are synonyms defined as:

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

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

papaya tree (noun)	Carica papaya (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