truncate vs geometry

truncate is not a noun while geometry is a noun.

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

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

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

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