Mammoth Uncensored Word List:
39 - 16 letter words starting with im

imaginablenesses immeasurableness immoderatenesses immortalizations immunochemically immunocompetence immunodeficiency immunodepression immunodiagnostic immunodiffusions immunogeneticist immunogenicities immunohematology immunomodulators immunomodulatory immunopathologic immunoreactivity immunoregulation immunoregulatory immunosuppressed immunosuppresses impassablenesses imperativenesses imperceptibility imperceptiveness imperfectability imperishableness impermeabilities impermissibility imperturbability imperviousnesses implausibilities implementational impossiblenesses impracticability impracticalities impregnabilities impressibilities impressivenesses