bitter的比较级为：bitterer...

foxy的比较级为：foxier...

nice的比较级为：nicer...

irregular的比较级为：more irregular...

exciting的比较级为：more exciting...

modest的比较级为：more modest...

round的比较级为：rounder...

often的比较级为：more often...

dear的比较级为：dearer...

beautiful的比较级为：more beautiful...

lucky的比较级为：luckier...

frank的比较级为：franker...

tawdry的比较级为：tawdrier...

fortunately的比较级为：more fortunately...

bright的比较级为：brighter...

roughly的比较级为：more roughly...

pure的比较级为：purer...

passionate的比较级为：more passionate...

tangy的比较级为：tangier...

crisp的比较级为：crisper...

welcome的比较级为：welcomer...

grand的比较级为：grander...

aery的比较级为：aerier...

dumb的比较级为：dumber...

empty的比较级为：emptier...

fresh的比较级为：fresher...

slim的比较级为：slimmer...

vile的比较级为：viler...

clear的比较级为：clearer...

sleepy的比较级为：sleepier...