rain forest vs wood

rain forest and wood both are nouns.

Word	Noun	Adjective	Verb	Adverb
rain forest	Yes	No	No	No
wood	Yes	No	No	No

As nouns, wood is a hypernym of rain forest; that is, wood is a word with a broader meaning than rain forest:

Other hypernyms of rain forest include forest, woods.

rain forest (noun)	wood (noun)
a forest with heavy annual rainfall	any wind instrument other than the brass instruments
	a golf club with a long shaft used to hit long shots; originally made with a wooden head
	the trees and other plants in a large densely wooded area
	the hard fibrous lignified substance under the bark of trees