geometry vs truncate

geometry is a noun but truncate is not a noun.

Word	Noun	Adjective	Verb	Adverb
geometry	Yes	No	No	No
truncate	No	Yes	Yes	No

geometry (noun)	truncate (noun)
the pure mathematics of points and lines and curves and surfaces

geometry (adjective)	truncate (adjective)
	terminating abruptly by having or as if having an end or point cut off

geometry (verb)	truncate (verb)
	make shorter as if by cutting off
	approximate by ignoring all terms beyond a chosen one
	replace a corner by a plane