We don't have synonyms for fatty acids yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are fatty acid and fatty-acid.
(n) :
(organic chemistry, biochemistry) Any of a class of aliphatic carboxylic acids, of general formula CₙH₂ₙ₊₁COOH, that occur combined with glycerol as animal or vegetable oils and fats. Only those with an even number of carbon atoms are normally found in natural fats.
(n) :
(organic chemistry, biochemistry) Any of a class of aliphatic carboxylic acids, of general formula CₙH₂ₙ₊₁COOH, that occur combined with glycerol as animal or vegetable oils and fats. Only those with an even number of carbon atoms are normally found in natural fats.