The comparitive word for the color blue can have a debate. I choose to say "more blue", but other people choose to say "bluer". So I guess either way can be used.
bluer, bluest
"Litter" is a noun and a verb and, as such, does not have a comparative degree.
There shouldn't be any, no colors can have degrees of comparison. Nevertheless, you could say (idiomatically) "blacker, the blackest".
A comparative for the word ineffectual is more ineffectual.
smoother is comparative of word smooth.
Dative ; hot Comparative ; hotter Superlative ; hottest
comparative
Sharper is the comparative form of the word sharp.
comparative
comparative
What's the comparative and superlative of the word "exact"
The comparative form of the word 'fast' is 'faster'.