wood vs jungle

wood and jungle both are nouns.

Word	Noun	Adjective	Verb	Adverb
wood	Yes	No	No	No
jungle	Yes	No	No	No

As nouns, jungle is a hyponym of wood; that is, jungle is a word with a more specific, narrower meaning than wood:

wood (noun)	jungle (noun)
any wind instrument other than the brass instruments	a place where hoboes camp
a golf club with a long shaft used to hit long shots; originally made with a wooden head	an impenetrable equatorial forest
the trees and other plants in a large densely wooded area	a location marked by an intense competition and struggle for survival
the hard fibrous lignified substance under the bark of trees