Mammoth Uncensored Word List:
108 words ending with in, 5 letters long

abrin actin again agrin algin aloin amain auxin basin bavin begin blain brain bruin burin cabin chain colin conin covin cumin cutin drain elain eldin elfin eloin elsin eosin ettin fagin ficin gamin grain groin hemin iodin kinin kylin lakin lapin lawin layin levin likin linin lipin login lupin lysin matin mavin mirin mucin mycin oggin olein opsin orcin orpin patin pavin pekin plain potin powin proin purin quoin ramin ravin rawin renin repin resin rewin ricin robin ronin rosin rutin sabin sarin sasin satin savin sdein serin sewin sitin skein slain sozin stain stein swain takin tamin thein toxin train twain ulmin unpin untin venin yogin zayin