Mammoth Uncensored Word List:
28 words that are 16 letters long beginning with l in the mammoth uncensored word list.

lactovegetarians lamentablenesses landlubberliness laparoendoscopic laparoscopically largeheartedness lasciviousnesses latensifications leptogeosyncline leukodystrophies libidinousnesses licentiousnesses lightheartedness lighthousekeeper lightstimulation lithocystotomies lithographically lithoheterotroph liverheartedness localizabilities longheadednesses loquaciousnesses lugubriousnesses luposlipaphobics lymphangiectasia lymphangiography lymphangiomatous lymphogranulomas