8 letters

greatens ∙ sweetens ∙ quietens ∙ expetens lightens ∙ rightens ∙ tightens ∙ penitens heartens ∙ smartens ∙ chortens ∙ shortens ∙ chastens ∙ guestens ∙ glistens ∙ moistens ∙ flattens ∙ twittens ∙ stoutens ∙ eloquens enlivens ∙ crivvens ∙ citoyens bedizens ∙ denizens ∙ netizens ∙ citizens ∙ chazzens ∙

9 letters

cistvaens ∙ kistvaens ∙ menhadens ∙ bemaddens ∙ Ternidens fissidens emboldens ∙ imboldens ∙ ascendens mediodens mesiodens rehardens ∙ faburdens ∙ unburdens ∙ spaldeens ∙ Aberdeens carageens ∙ drisheens ∙ spalpeens ∙ tagareens ∙ bescreens ∙ rescreens ∙ shagreens ∙ sengreens ∙ squireens ∙ outpreens ∙ yestreens ∙ khamseens ∙ nineteens ∙ eighteens ∙ poshteens ∙ thirteens ∙ fourteens ∙ postteens ∙ sleeveens ∙ overweens ∙ armozeens ∙ bedeafens ∙ baclofens ∙ collagens ∙ staragens ∙ miscegens ∙ aborigens ∙ florigens ∙ cultigens ∙ glycogens ∙ amidogens ∙ osteogens ∙ pathogens ∙ hyalogens ∙ diplogens ∙ amylogens ∙ Cormogens cyanogens ∙ androgens ∙ hydrogens ∙ nitrogens ∙ estrogens ∙ photogens ∙ histogens ∙ enlargens ∙ allergens ∙ roentgens ∙ attrahens ∙ groschens ∙ cratchens hazelhens ∙ thiophens ∙ dakerhens ∙ waterhens ∙ parishens ∙ lengthens ∙ smoothens ∙ definiens ∙ impatiens ∙ reawakens ∙ dislikens ∙ bedarkens ∙ magdalens ∙ psoralens ∙ fluellens ∙ attollens ∙ cyclamens ∙ clinamens ∙ gravamens ∙ specimens ∙ nutrimens prenomens ∙ cognomens ∙ prominens velskoens ∙ behappens ∙ Pirmasens shamisens ∙ unloosens ∙ theirsens Vieussens threatens ∙ resoftens ∙ heightens ∙ brightens ∙ frightens ∙ straitens ∙ refastens ∙ unfastens ∙ sebestens ∙ tungstens ∙ christens ∙ confluens henequens ∙ heniquens ∙ nonwovens ∙ naproxens ∙

10 letters

adulescens adcrescens rebroadens outreddens ∙ mermaidens ∙ descendens quarendens ∙ Jeholodens prehardens ∙ subwardens ∙ disburdens ∙ carrageens ∙ palankeens ∙ damaskeens ∙ fillipeens ∙ pistareens ∙ prescreens ∙ sunscreens ∙ Flyscreens ∙ shivereens evergreens ∙ overgreens ∙ velveteens ∙ seventeens ∙ halloweens tamoxifens ∙ ibuprofens ∙ chalcogens ∙ morphogens ∙ thallogens phellogens ∙ chromogens ∙ mucinogens ∙ immunogens ∙ Goitrogens ∙ oestrogens ∙ Teratogens ∙ Adaptogens ∙ Clastogens Dictyogens ∙ trioxygens ∙ schatchens ∙ refreshens ∙ unburthens ∙ despiciens Cabochiens conveniens requickens ∙ foretokens ∙ foraramens gentlemens praenomens ∙ energumens ∙ veldskoens ∙ perlemoens ∙ overripens ∙ mishappens ∙ mislippens ∙ resharpens ∙ enlightens ∙ benightens ∙ retightens ∙ omnipotens enheartens ∙ remoistens ∙ infrequens subsequens breakevens ∙ garryowens ∙ woadwaxens ∙ woodwaxens ∙ outbrazens ∙ endenizens ∙

11 letters

Purpuricens handmaidens ∙ gleemaidens ∙ casehardens firewardens ∙ overburdens ∙ carragheens ∙ mavourneens ∙ windscreens ∙ telescreens ∙ firescreens ∙ silkscreens ∙ meatscreens ∙ flatscreens ∙ Smithereens ∙ mondegreens ∙ mangosteens ∙ volkswagens neoantigens isoantigens ∙ thrombogens ∙ thylacogens Methanogens carcinogens ∙ caseinogens ∙ fibrinogens ∙ pepsinogens ∙ electrogens ∙ dermatogens ∙ nonheathens strengthens ∙ disburthens ∙ quindeciens Leucotriens aliquotiens hamesuckens ∙ bousingkens ∙ frithsokens ∙ Catechumens ∙ underlinens ∙ incontinens veldschoens ∙ dukkeripens ∙ indifferens presweetens ∙ outsweetens ∙ disquietens ∙ straightens ∙ affrightens ∙ pennipotens disheartens ∙ premoistens ∙ rechristens ∙ unchristens ∙ incongruens overleavens ∙ yesterevens ∙ noncitizens ∙

12 letters

waldsterbens ∙ bridemaidens ∙ superhardens ∙ disemburdens ∙ smokescreens ∙ superscreens ∙ choirscreens ∙ sightscreens ∙ wintergreens ∙ antimutagens ∙ alloantigens ∙ esthesiogens ∙ plasmalogens leucaemogens ∙ plasminogens ∙ trypsinogens ∙ calyptrogens ∙ progestogens ∙ overburthens ∙ inconveniens antislickens millisiemens microsiemens biospecimens lepidosirens ∙ sauerbratens ∙ oversweetens ∙ reenlightens overtightens ∙ Andramartens foreshortens ∙

13 letters

Churchwardens ∙ aesthesiogens ∙ nonchromogens paracyanogens ∙ cocarcinogens ∙ Hallucinogens ∙ urobilinogens ∙ agglutinogens ∙ parahydrogens ∙ antihydrogens ∙ antiestrogens ∙ Xenoestrogens overlengthens ∙ restrengthens ∙ jeewhillikens streptosolens ∙ spiegeleisens ∙ delicatessens ∙ restraightens kindergartens ∙

14 letters

tropocollagens ∙ phytopathogens ∙ ferricyanogens ∙ ferrocyanogens ∙ noncarcinogens ∙ procarcinogens porphyrinogens orthohydrogens ∙ phytoestrogens ∙ milliroentgens ∙ acetaminophens ∙ representamens ∙

15 letters

scotochromogens photochromogens anticarcinogens ∙ precipitinogens ∙ encephalitogens ∙ intussuscipiens

16 letters

bacteriocinogens prekindergartens

Words with a ∙ are valid Scrabble words (SOWPODS word list)