name calling vs calumniation

name calling and calumniation both are nouns.

Word	Noun	Adjective	Verb	Adverb
name calling	Yes	No	No	No
calumniation	Yes	No	No	No

As nouns, calumniation is a hypernym of name calling; that is, calumniation is a word with a broader meaning than name calling:

name calling: verbal abuse; a crude substitute for argument
calumniation: a false accusation of an offense or a malicious misrepresentation of someone's words or actions

Other hypernyms of name calling include calumny, defamation, hatchet job, obloquy, traducement.

name calling (noun)	calumniation (noun)
verbal abuse; a crude substitute for argument	a false accusation of an offense or a malicious misrepresentation of someone's words or actions