common fig vs common fig tree

common fig and common fig tree both are nouns.

Word	Noun	Adjective	Verb	Adverb
common fig	Yes	No	No	No
common fig tree	Yes	No	No	No

As nouns, common fig and common fig tree are synonyms defined as:

common fig and common fig tree: Mediterranean tree widely cultivated for its edible fruit

Other synonyms of common fig include Ficus carica, fig.

common fig (noun)	common fig tree (noun)
Mediterranean tree widely cultivated for its edible fruit	Mediterranean tree widely cultivated for its edible fruit