Mammoth Uncensored Word List:
50 - 14 letter words starting with fo

folliculitides folliculitises fonctionnaires foodlessnesses footlessnesses footplatewoman footplatewomen footsorenesses foraminiferans foraminiferous foraminotomies forbiddingness forcefulnesses forciblenesses forebodingness foregonenesses forehandedness forejudgements foreknowledges foreordainment foreordination foreseeability foreshadowings foreshortening foresignifying forestallments forethoughtful forgeabilities forisfamiliate formalisations formalizations formidableness formlessnesses fornicatresses forsakennesses forswornnesses forthrightness fortifications fortuitousness fortunetellers fortunetelling fortysomething forwardlooking fossilisations fossilizations fosterchildren foundationally foundationless fourfoldnesses foursquareness