acetum vs vinegar

acetum and vinegar both are nouns.

Word	Noun	Adjective	Verb	Adverb
acetum	Yes	No	No	No
vinegar	Yes	No	No	No

As nouns, acetum and vinegar are synonyms defined as:

acetum and vinegar: sour-tasting liquid produced usually by oxidation of the alcohol in wine or cider and used as a condiment or food preservative

acetum (noun)	vinegar (noun)
sour-tasting liquid produced usually by oxidation of the alcohol in wine or cider and used as a condiment or food preservative	sour-tasting liquid produced usually by oxidation of the alcohol in wine or cider and used as a condiment or food preservative
a dilute solution of acetic acid that is used as a solvent (e.g. for a drug)	dilute acetic acid