moniker vs soubriquet

moniker and soubriquet both are nouns.

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

As nouns, moniker and soubriquet are synonyms defined as:

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

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

moniker (noun)	soubriquet (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)