breast feeding vs nursing

breast feeding and nursing both are nouns.

Word	Noun	Adjective	Verb	Adverb
breast feeding	Yes	No	No	No
nursing	Yes	No	No	No

As nouns, breast feeding and nursing are synonyms defined as:

breast feeding (noun)	nursing (noun)
nourishing at the breast	the work of caring for the sick or injured or infirm
	nourishing at the breast
	the profession of a nurse