is a specific kind of: acid.

is a broader term that covers: acetic acid, ethanoic acid | adipic acid, hexanedioic acid | mucic acid | octanedioic acid, suberic acid | succinic acid | saccharic acid | decanedioic acid, sebacic acid | sorbic acid | pentanoic acid, valeric acid | fatty acid | benzoic acid | propanoic acid, propionic acid | lactic acid | acrylic acid, propenoic acid ... show more.