Verb
to quit [ quit / quitted ; quit / quitted ]
to depart [ departed ; departed ]
Adjektive
treacherous [ more treacherous ; most treacherous ]
insidious [ more insidious ; most insidious]
false [ falser ; falsest]
faithless [ more faithless ; most faithless]
murderous [ more murderous ; most murderous ]
traitorous [ more traitorous ; most traitorous]
treasonable [ more treasonable ; most treasonable]
viperous [ more viperous ; most viperous]
...
Noun
viper [pl. vipers]