Adjektive
naive [ more naive ; most naive ]
gullible [ more gullible ; most gullible ]
simple {minded}
guileless [ more guileless ; most guileless]
natural [ more natural ; most natural ]
credulous [ more credulous ; most credulous ]
artless [ more artless ; most artless ]
Noun
slob [pl. slobs]
goose [pl. geese]
simpleton [pl. simpletons]
rube [pl. rubes]
ninny [pl. ninnies]
sucker [pl. suckers]
mutt [pl. mutts]
dupe [pl. dupes]
coot [pl. coots]
boob [pl. boobs]
gull {birds}
zany [pl. zanies]
Adverb