The positive form is the original adjective. The comparative form shows a greater degree of quality. The superlative form shows the highest degree of quality.
"Most painful" is the superlative. The positive is "painful", the root adjective. The comparative is "most painful".
They are painful and more painful, respectively.
more painful
most painful
"Litter" is a noun and a verb and, as such, does not have a comparative degree.
The comparative degree is 'more magnificent' and the superlative degree is 'most magnificent'.
more upset
more fascinating
The comparative and superlative degree for the word courageous is more courageous and most courageous. for example Sam is more courageous than Tom.(comparative degree) Sam is the most courageous boy in the class
more painful, most painful
"Litter" is a noun and a verb and, as such, does not have a comparative degree.
more out
more out
better for its comparative and best for its superlative
The comparative degree is 'more magnificent' and the superlative degree is 'most magnificent'.
abler
sicker
nicer
finer, finest
greedier, greediest
More is comparative. The progression is many, more, most