criminal conversation vs adultery

criminal conversation and adultery both are nouns.

Word	Noun	Adjective	Verb	Adverb
criminal conversation	Yes	No	No	No
adultery	Yes	No	No	No

As nouns, criminal conversation and adultery are synonyms defined as:

criminal conversation and adultery: extramarital sex that willfully and maliciously interferes with marriage relations

Other synonyms of criminal conversation include fornication.

criminal conversation (noun)	adultery (noun)
extramarital sex that willfully and maliciously interferes with marriage relations	extramarital sex that willfully and maliciously interferes with marriage relations