omnium-gatherum vs mingle-mangle

omnium-gatherum and mingle-mangle both are nouns.

Word	Noun	Adjective	Verb	Adverb
omnium-gatherum	Yes	No	No	No
mingle-mangle	Yes	No	No	No

As nouns, omnium-gatherum and mingle-mangle are synonyms defined as:

Other synonyms of omnium-gatherum include farrago, gallimaufry, hodgepodge, hotchpotch, melange, mishmash, oddments, odds and ends, ragbag.

omnium-gatherum (noun)	mingle-mangle (noun)
a motley assortment of things	a motley assortment of things