split-half correlation vs chance-half correlation

split-half correlation and chance-half correlation both are nouns.

Word	Noun	Adjective	Verb	Adverb
split-half correlation	Yes	No	No	No
chance-half correlation	Yes	No	No	No

As nouns, split-half correlation and chance-half correlation are synonyms defined as:

split-half correlation and chance-half correlation: a correlation coefficient calculated between scores on two halves of a test; taken as an indication of the reliability of the test

split-half correlation (noun)	chance-half correlation (noun)
a correlation coefficient calculated between scores on two halves of a test; taken as an indication of the reliability of the test	a correlation coefficient calculated between scores on two halves of a test; taken as an indication of the reliability of the test