breech birth vs breech delivery

breech birth and breech delivery both are nouns.

Word	Noun	Adjective	Verb	Adverb
breech birth	Yes	No	No	No
breech delivery	Yes	No	No	No

As nouns, breech birth and breech delivery are synonyms defined as:

breech birth and breech delivery: delivery of an infant whose feet or buttocks appear first

Other synonyms of breech birth include breech presentation.

breech birth (noun)	breech delivery (noun)
delivery of an infant whose feet or buttocks appear first	delivery of an infant whose feet or buttocks appear first