skew correlation vs curvilinear correlation

skew correlation and curvilinear correlation both are nouns.

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

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

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

Other synonyms of skew correlation include nonlinear correlation.

skew correlation (noun)	curvilinear 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