nurse vs breastfeed

nurse is a noun but breastfeed is not a noun.

Word	Noun	Adjective	Verb	Adverb
nurse	Yes	No	Yes	No
breastfeed	No	No	Yes	No

As verbs, nurse and breastfeed are synonyms defined as:

Other synonyms of nurse include give suck, lactate, suck, suckle, wet-nurse.

nurse (noun)	breastfeed (noun)
one skilled in caring for young children or the sick (usually under the supervision of a physician)
a woman who is the custodian of children

nurse (verb)	breastfeed (verb)
try to cure by special care of treatment, of an illness or injury	give suck to
give suck to
maintain (a theory, thoughts, or feelings)
serve as a nurse; care for sick or handicapped people
treat carefully