Ficus deltoidea vs fig tree

Ficus deltoidea and fig tree both are nouns.

Word	Noun	Adjective	Verb	Adverb
Ficus deltoidea	Yes	No	No	No
fig tree	Yes	No	No	No

As nouns, fig tree is a hypernym of Ficus deltoidea; that is, fig tree is a word with a broader meaning than Ficus deltoidea:

Ficus deltoidea: shrub or small tree often grown as a houseplant having foliage like mistletoe
fig tree: any moraceous tree of the tropical genus Ficus; produces a closed pear-shaped receptacle that becomes fleshy and edible when mature

Ficus deltoidea (noun)	fig tree (noun)
shrub or small tree often grown as a houseplant having foliage like mistletoe	any moraceous tree of the tropical genus Ficus; produces a closed pear-shaped receptacle that becomes fleshy and edible when mature