law of parsimony vs principle of parsimony

law of parsimony and principle of parsimony both are nouns.

Word	Noun	Adjective	Verb	Adverb
law of parsimony	Yes	No	No	No
principle of parsimony	Yes	No	No	No

As nouns, law of parsimony and principle of parsimony are synonyms defined as:

law of parsimony and principle of parsimony: the principle that entities should not be multiplied needlessly; the simplest of two competing theories is to be preferred

Other synonyms of law of parsimony include Occam's Razor, Ockham's Razor.

law of parsimony (noun)	principle of parsimony (noun)
the principle that entities should not be multiplied needlessly; the simplest of two competing theories is to be preferred	the principle that entities should not be multiplied needlessly; the simplest of two competing theories is to be preferred