Mammoth Uncensored Word List:
39 - 15 letter words starting with w

walloonophobics wappenschawings warmbloodedness warmheartedness warrantableness wasterfulnesses watercolourists waterlessnesses watersaturation weakheartedness wealthmongering wearisomenesses weatherboarding weatherisations weatherizations weatherlinesses weatherproofers weatherproofing weatherstripped weatherstripper wellestablished wellintentioned weltanschauungs westernisations westernizations whatchamacallit wheelchairbound whimsicalnesses whippersnappers whistleblowings wholesomenesses whoremistresses withdrawnnesses woebegonenesses wonderfulnesses wondermongering worrisomenesses worthlessnesses wrongheadedness