A really fast thesaurus... with lots of synonyms.
We don't have synonyms for fattiest yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are attest, farthest and fattish.
We don't have any synonyms for fattiest yet.
Think fattiest belongs in the thesaurus? Recommend it and we'll take a look.