birth vs expect

birth is a noun but expect is not a noun.

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

As verbs, expect is a hyponym of birth; that is, expect is a word with a more specific, narrower meaning than birth:

birth (noun)	expect (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)	expect (verb)
cause to be born	be pregnant with
	look forward to the birth of a child
	regard something as probable or likely
	look forward to the probable occurrence of
	consider reasonable or due
	consider obligatory; request and expect