ply vs combining form

ply and combining form both are nouns.

Word	Noun	Adjective	Verb	Adverb
ply	Yes	No	Yes	No
combining form	Yes	No	No	No

ply (noun)	combining form (noun)
(usually in combinations) one of several layers of cloth or paper or wood as in plywood	a bound form used only in compounds
one of the strands twisted together to make yarn or rope or thread; often used in combination

ply (verb)	combining form (verb)
give what is desired or needed, especially support, food or sustenance
use diligently
wield vigorously
join together as by twisting, weaving, or molding
travel a route regularly
apply oneself diligently