plant vs afforest

plant is a noun but afforest is not a noun.

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

As verbs, afforest is a hyponym of plant; that is, afforest is a word with a more specific, narrower meaning than plant:

Other hyponyms of plant include root, puddle, checkrow, bed, dibble, forest, replant, tree.

plant (noun)	afforest (noun)
(botany) a living organism lacking the power of locomotion
buildings for carrying on industrial labor
something planted secretly for discovery by another
an actor situated in the audience whose acting is rehearsed but seems spontaneous to the audience

plant (verb)	afforest (verb)
put firmly in the mind	establish a forest on previously unforested land
put or set (seeds, seedlings, or plants) into the ground
fix or set securely or deeply
place something or someone in a certain position in order to secretly observe or deceive
set up or lay the groundwork for
place into a river