heuristic vs heuristic rule

heuristic and heuristic rule both are nouns.

Word	Noun	Adjective	Verb	Adverb
heuristic	Yes	Yes	No	No
heuristic rule	Yes	No	No	No

As nouns, heuristic and heuristic rule are synonyms defined as:

heuristic and heuristic rule: a commonsense rule (or set of rules) intended to increase the probability of solving some problem

Other synonyms of heuristic include heuristic program.

heuristic (noun)	heuristic rule (noun)
a commonsense rule (or set of rules) intended to increase the probability of solving some problem	a commonsense rule (or set of rules) intended to increase the probability of solving some problem

heuristic (adjective)	heuristic rule (adjective)
of or relating to or using a general formulation that serves to guide investigation