greenwood vs forest

greenwood and forest both are nouns.

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

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

Other hypernyms of greenwood include timber, timberland, woodland.

greenwood (noun)	forest (noun)
woodlands in full leaf	the trees and other plants in a large densely wooded area
	land that is covered with trees and shrubs

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