afforest vs forest

afforest is not a noun while forest is a noun.

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

As verbs, afforest and forest are synonyms defined as:

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

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