birth vs give birth

birth is a noun but give birth is not a noun.

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

As verbs, birth and give birth are synonyms defined as:

Other synonyms of birth include bear, deliver, have.

birth (noun)	give birth (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)	give birth (verb)
cause to be born	cause to be born
	create or produce an idea