nonlinear correlation vs skew correlation

nonlinear correlation and skew correlation both are nouns.

Word	Noun	Adjective	Verb	Adverb
nonlinear correlation	Yes	No	No	No
skew correlation	Yes	No	No	No

As nouns, nonlinear correlation and skew correlation are synonyms defined as:

nonlinear correlation and skew correlation: any correlation in which the rates of change of the variables is not constant

Other synonyms of nonlinear correlation include curvilinear correlation.

nonlinear correlation (noun)	skew correlation (noun)
any correlation in which the rates of change of the variables is not constant	any correlation in which the rates of change of the variables is not constant