heuristic rule vs heuristic

heuristic rule and heuristic both are nouns.

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

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

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

Other synonyms of heuristic rule include heuristic program.

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