Narrow more narrow much more narrow
Cot cotter. the cottest
Happy happier the happiest
Large larger the largest
Punctual more punctual much more punctual
Colt colter the coltest
Dippitult more dippitult much more dippitult
Pat patter the pattest
Pumy pumier the pumiest
Clever more clever much more clever
Noisy noisier the noisiest