acetic acid vs vinegar

acetic acid and vinegar both are nouns.

Word	Noun	Adjective	Verb	Adverb
acetic acid	Yes	No	No	No
vinegar	Yes	No	No	No

As nouns, vinegar is a hyponym of acetic acid; that is, vinegar is a word with a more specific, narrower meaning than acetic acid:

acetic acid: a colorless pungent liquid widely used in manufacturing plastics and pharmaceuticals
vinegar: dilute acetic acid

Other hyponyms of acetic acid include acetum, trichloracetic acid, trichloroacetic acid.

acetic acid (noun)	vinegar (noun)
a colorless pungent liquid widely used in manufacturing plastics and pharmaceuticals	sour-tasting liquid produced usually by oxidation of the alcohol in wine or cider and used as a condiment or food preservative
	dilute acetic acid