linguistic rule vs conception

linguistic rule and conception both are nouns.

Word	Noun	Adjective	Verb	Adverb
linguistic rule	Yes	No	No	No
conception	Yes	No	No	No

As nouns, conception is a hypernym of linguistic rule; that is, conception is a word with a broader meaning than linguistic rule:

linguistic rule: (linguistics) a rule describing (or prescribing) a linguistic practice
conception: an abstract or general idea inferred or derived from specific instances

Other hypernyms of linguistic rule include concept, construct.

linguistic rule (noun)	conception (noun)
(linguistics) a rule describing (or prescribing) a linguistic practice	the act of becoming pregnant; fertilization of an ovum by a spermatozoon
	an abstract or general idea inferred or derived from specific instances
	the creation of something in the mind
	the event that occurred at the beginning of something