moniker vs sobriquet

moniker and sobriquet both are nouns.

Word	Noun	Adjective	Verb	Adverb
moniker	Yes	No	No	No
sobriquet	Yes	No	No	No

As nouns, moniker and sobriquet are synonyms defined as:

moniker and sobriquet: a familiar name for a person (often a shortened version of a person's given name)

Other synonyms of moniker include byname, cognomen, nickname, soubriquet.

moniker (noun)	sobriquet (noun)
a familiar name for a person (often a shortened version of a person's given name)	a familiar name for a person (often a shortened version of a person's given name)