go after vs tree

go after is not a noun while tree is a noun.

Word	Noun	Adjective	Verb	Adverb
go after	No	No	Yes	No
tree	Yes	No	Yes	No

As verbs, tree is a hyponym of go after; that is, tree is a word with a more specific, narrower meaning than go after:

Other hyponyms of go after include quest, hound, hunt, trace, run down.

go after (noun)	tree (noun)
	a tall perennial woody plant having a main trunk and branches forming a distinct elevated crown; includes both gymnosperms and angiosperms
	a figure that branches from a single root

go after (verb)	tree (verb)
go in search of or hunt for	stretch (a shoe) on a shoetree
go after with the intent to catch	chase an animal up a tree
	plant with trees
	force a person or an animal into a position from which he cannot escape