Little is not itself a comparative. There are two types of comparative for little: If you are using little to describe size (as in "A little old lady"), then the comparative is littler (as in, "Her husband was even littler"); if you are using little to describe quantity (as in "I want a little more ice cream"), then the comparative is less (as in, "I want less ice cream than that!").
little, littler, littlest little, less, least
littler, littlest or less, least
littler, littlest less, least
The comparative degree is bigger.
The comparative degree is wider.
"Less" is the comparative degree of little.
"Less" is the comparative degree of little. The superlative degree is least.
little, littler, littlest little, less, least
littler, littlest less, least
littler, littlest or less, least
Teapot is a noun and, as such, does not have a comparative degree.
The comparative degree is bigger.
The comparative degree is wider.
Thriftier is the comparative degree of thrifty.
"Speed" is a noun and a verb and, as such, does not have a comparative degree. The comparative of the adjective speedy is speedier.
"Message" is a noun and (these days) a verb and, as such, does not have a comparative degree.
"More important" is the comparative degree of important.