tree vs plane figure

tree and plane figure both are nouns.

Word	Noun	Adjective	Verb	Adverb
tree	Yes	No	Yes	No
plane figure	Yes	No	No	No

As nouns, plane figure is a hypernym of tree; that is, plane figure is a word with a broader meaning than tree:

Other hypernyms of tree include two-dimensional figure.

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

tree (verb)	plane figure (verb)
stretch (a shoe) on a shoetree
chase an animal up a tree
plant with trees
force a person or an animal into a position from which he cannot escape