cogwheel vs cog

cogwheel and cog both are nouns.

Word	Noun	Adjective	Verb	Adverb
cogwheel	Yes	No	No	No
cog	Yes	No	Yes	No

cogwheel (noun)	cog (noun)
a toothed wheel that engages another toothed mechanism in order to change the speed or direction of transmitted motion	tooth on the rim of gear wheel
	a subordinate who performs an important but routine function

cogwheel (verb)	cog (verb)
	join pieces of wood with cogs
	roll steel ingots