subdivision vs subdivide

subdivision is a noun but subdivide is not a noun.

Word	Noun	Adjective	Verb	Adverb
subdivision	Yes	No	No	No
subdivide	No	No	Yes	No

subdivision (noun)	subdivide (noun)
the act of subdividing; division of something previously divided
a section of a section; a part of a part; i.e., a part of something already divided
a self-contained part of a larger composition (written or musical)
a division of some larger or more complex organization
an area composed of subdivided lots

subdivision (verb)	subdivide (verb)
	divide into smaller and smaller pieces
	form into subdivisions