tree vs elongate

tree is a noun but elongate is not a noun.

As verbs, elongate is a hypernym of tree; that is, elongate is a word with a broader meaning than tree:

Other hypernyms of tree include stretch.

tree (noun)	elongate (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

tree (adjective)	elongate (adjective)
	(of a leaf shape) long and narrow
	having notably more length than width; being long and slender

tree (verb)	elongate (verb)
force a person or an animal into a position from which he cannot escape	make long or longer by pulling and stretching
plant with trees
chase an animal up a tree
stretch (a shoe) on a shoetree