Mammoth Uncensored Word List:
37 - 11 letter words starting with gi

gibberellic gibberellin gibberishes gibbosities gibbousness giddinesses giftwrapped gigahertzes giganewtons gigantesque giganticide gigantology gigaseconds gigmanities gilliflower gillnetters gillnetting gillravaged gillravages gillravitch gilravagers gilravaging gimcrackery gimmickiest gimmickries gingerbread gingerroots gingersnaps girdlecakes girdlescone girdlestead girlfriends girlishness girlschools gismologies givennesses gizmologies