gnetum vs gymnospermous tree

gnetum and gymnospermous tree both are nouns.

Word	Noun	Adjective	Verb	Adverb
gnetum	Yes	No	No	No
gymnospermous tree	Yes	No	No	No

As nouns, gymnospermous tree is a hypernym of gnetum; that is, gymnospermous tree is a word with a broader meaning than gnetum:

gnetum: small tropical tree with tiered branches and divaricate branchlets having broad glossy dark green leaves; exploited for its edible young leaves and seeds that provide a fine flour
gymnospermous tree: any tree of the division Gymnospermophyta

gnetum (noun)	gymnospermous tree (noun)
small tropical tree with tiered branches and divaricate branchlets having broad glossy dark green leaves; exploited for its edible young leaves and seeds that provide a fine flour	any tree of the division Gymnospermophyta