tetrachoric correlation coefficient vs tetrachoric correlation

tetrachoric correlation coefficient and tetrachoric correlation both are nouns.

Word	Noun	Adjective	Verb	Adverb
tetrachoric correlation coefficient	Yes	No	No	No
tetrachoric correlation	Yes	No	No	No

As nouns, tetrachoric correlation coefficient and tetrachoric correlation are synonyms defined as:

tetrachoric correlation coefficient and tetrachoric correlation: a correlation coefficient computed for two normally distributed variables that are both expressed as a dichotomy

tetrachoric correlation coefficient (noun)	tetrachoric correlation (noun)
a correlation coefficient computed for two normally distributed variables that are both expressed as a dichotomy	a correlation coefficient computed for two normally distributed variables that are both expressed as a dichotomy