spanking vs discipline

spanking and discipline both are nouns.

Word	Noun	Adjective	Verb	Adverb
spanking	Yes	Yes	No	No
discipline	Yes	No	Yes	No

As nouns, discipline is a hypernym of spanking; that is, discipline is a word with a broader meaning than spanking:

Other hypernyms of spanking include correction.

spanking (noun)	discipline (noun)
the act of slapping on the buttocks	training to improve strength or self-control
	the act of disciplining
	the trait of being well behaved
	a branch of knowledge
	a system of rules of conduct or method of practice

spanking (adjective)	discipline (adjective)
quick and energetic

spanking (verb)	discipline (verb)
	punish in order to gain control or enforce obedience
	develop (a child's or animal's) behavior by instruction and practice; especially to teach self-control