birth vs birthing

birth and birthing both are nouns.

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

As nouns, birth and birthing are synonyms defined as:

Other synonyms of birth include giving birth, parturition.

birth (noun)	birthing (noun)
the event of being born	the process of giving birth
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)	birthing (verb)
cause to be born