birth vs conceive

birth is a noun but conceive is not a noun.

Word	Noun	Adjective	Verb	Adverb
birth	Yes	No	Yes	No
conceive	No	No	Yes	No

birth (noun)	conceive (noun)
the event of being born
a baby born; an offspring
the process of giving birth
the kinship relation of an offspring to the parents
the time when something begins (especially life)

birth (verb)	conceive (verb)
cause to be born	become pregnant; undergo conception
	judge or regard; look upon; judge
	have the idea for