ginkgo vs gymnospermous tree

ginkgo and gymnospermous tree both are nouns.

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

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

ginkgo: deciduous dioecious Chinese tree having fan-shaped leaves and fleshy yellow seeds; exists almost exclusively in cultivation especially as an ornamental street tree
gymnospermous tree: any tree of the division Gymnospermophyta

ginkgo (noun)	gymnospermous tree (noun)
deciduous dioecious Chinese tree having fan-shaped leaves and fleshy yellow seeds; exists almost exclusively in cultivation especially as an ornamental street tree	any tree of the division Gymnospermophyta