phi coefficient vs fourfold point correlation

phi coefficient and fourfold point correlation both are nouns.

Word	Noun	Adjective	Verb	Adverb
phi coefficient	Yes	No	No	No
fourfold point correlation	Yes	No	No	No

As nouns, phi coefficient and fourfold point correlation are synonyms defined as:

phi coefficient and fourfold point correlation: an index of the relation between any two sets of scores that can both be represented on ordered binary dimensions (e.g., male-female)

Other synonyms of phi coefficient include phi correlation.

phi coefficient (noun)	fourfold point correlation (noun)
an index of the relation between any two sets of scores that can both be represented on ordered binary dimensions (e.g., male-female)	an index of the relation between any two sets of scores that can both be represented on ordered binary dimensions (e.g., male-female)