omnium-gatherum vs odds and ends

omnium-gatherum and odds and ends both are nouns.

Word	Noun	Adjective	Verb	Adverb
omnium-gatherum	Yes	No	No	No
odds and ends	Yes	No	No	No

As nouns, omnium-gatherum and odds and ends are synonyms defined as:

Other synonyms of omnium-gatherum include farrago, gallimaufry, hodgepodge, hotchpotch, melange, mingle-mangle, mishmash, oddments, ragbag.

omnium-gatherum (noun)	odds and ends (noun)
a motley assortment of things	a motley assortment of things