Mammoth Uncensored Word List:
56 words ending with en, 12 letters long

aesthesiogen agglutinogen ambulancemen antiandrogen antiestrogen antihydrogen artillerymen backcourtmen backswordmen backwoodsmen churchwarden cocarcinogen cochairwomen committeemen councilwomen countrywomen deepwatermen delicatessen dumbstricken footplatemen frontiersmen ghostwritten hallucinogen halterbroken hamantaschen kindergarten laundrywomen longshoremen lovechildren luftmenschen monohydrogen moonchildren moonstricken mycoestrogen newspapermen nonevergreen nonforbidden overlengthen overstridden paracyanogen parahydrogen restraighten restrengthen saltpetremen servicewomen seventyseven slaughtermen spiegeleisen stepchildren streptosolen thrombinogen underwritten unwithholden urobilinogen warehousemen workingwomen