forest vs wood

forest and wood both are nouns.

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

As nouns, forest and wood are synonyms defined as:

forest and wood: the trees and other plants in a large densely wooded area

Other synonyms of forest include woods.

forest (noun)	wood (noun)
the trees and other plants in a large densely wooded area	any wind instrument other than the brass instruments
land that is covered with trees and shrubs	a golf club with a long shaft used to hit long shots; originally made with a wooden head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

forest (verb)	wood (verb)
establish a forest on previously unforested land