Stevens' law vs Stevens' power law

Stevens' law and Stevens' power law both are nouns.

Word	Noun	Adjective	Verb	Adverb
Stevens' law	Yes	No	No	No
Stevens' power law	Yes	No	No	No

As nouns, Stevens' law and Stevens' power law are synonyms defined as:

Stevens' law and Stevens' power law: (psychophysics) the concept that the magnitude of a subjective sensation increases proportional to a power of the stimulus intensity

Other synonyms of Stevens' law include power law.

Stevens' law (noun)	Stevens' power law (noun)
(psychophysics) the concept that the magnitude of a subjective sensation increases proportional to a power of the stimulus intensity	(psychophysics) the concept that the magnitude of a subjective sensation increases proportional to a power of the stimulus intensity