WordNet records no synonym and no antonym for alpha-linolenic acid. It is the only member of its synset, which is common for technical, taxonomic and single-sense vocabulary — there is no other English word that means the same thing. The broader and narrower terms below are the useful relations in that case.
Counts are distinct word forms across every sense. A synonym that appears under three senses is counted once here and shown three times below, under each sense it belongs to.
a polyunsaturated fatty acid with 18 carbon atoms; the only omega-3 fatty acid found in vegetable products; it is most abundant in canola oil; a fatty acid essential for nutrition
Synonyms, antonyms and the broader and narrower relations for alpha-linolenic acid come from Princeton University’s WordNet. Full sources and licences.