Mammoth Uncensored Word List:
48 words ending with wn, 9 letters long

bestknown breakdown bringdown builddown chinatown clampdown closedown cloudtown countdown crackdown crosstown eiderdown foreknown foreshewn foreshown frogspawn fullblown fullgrown handblown homegrown knockdown misthrown nightgown outthrown overblown overdrawn overflown overgrown pastedown phasedown roughhewn scrumdown seldshown shakedown shootdown shortgown smalltown spelldown tablesawn throwdown touchdown unbeknown undergown undersown wellknown windblown wiredrawn withdrawn