suckle vs nurse

suckle is not a noun while nurse is a noun.

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

As verbs, suckle and nurse are synonyms defined as:

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

suckle (noun)	nurse (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

suckle (verb)	nurse (verb)
give suck to	try to cure by special care of treatment, of an illness or injury
suck milk from the mother's breasts	give suck to
	maintain (a theory, thoughts, or feelings)
	serve as a nurse; care for sick or handicapped people
	treat carefully