ology vs discipline

ology and discipline both are nouns.

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

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

ology: an informal word (abstracted from words with this ending) for some unidentified branch of knowledge
discipline: a branch of knowledge

Other hypernyms of ology include bailiwick, field, field of study, study, subject, subject area, subject field.

ology (noun)	discipline (noun)
an informal word (abstracted from words with this ending) for some unidentified branch of knowledge	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

ology (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