oleomargarine vs oleo

oleomargarine and oleo both are nouns.

Word	Noun	Adjective	Verb	Adverb
oleomargarine	Yes	No	No	No
oleo	Yes	No	No	No

As nouns, oleomargarine and oleo are synonyms defined as:

oleomargarine and oleo: a spread made chiefly from vegetable oils and used as a substitute for butter

Other synonyms of oleomargarine include margarin, margarine, marge.

oleomargarine (noun)	oleo (noun)
a spread made chiefly from vegetable oils and used as a substitute for butter	a spread made chiefly from vegetable oils and used as a substitute for butter