"more active"
The comparative and superlative degrees of "white" are formed in the standard way: "whiter" and "whitest" respectively.
more lasting, most lasting
The comparative degree of "dry" is "drier," and the superlative degree is "driest." These forms are used to compare the dryness of two or more items or conditions. For example, you might say "This towel is drier than that one," or "This is the driest place I've ever visited."
The comparative degree of "dirty" is "dirtier," and the superlative degree is "dirtiest." These forms are used to compare the level of dirtiness between two or more objects or subjects. For example, you might say, "This shirt is dirtier than that one," or "This is the dirtiest shirt I own."
more humid, most humid
The comparative degree of "holy" is "holier."
Teapot is a noun and, as such, does not have a comparative degree.
The comparative degree is wider.
"Less" is the comparative degree of little.
Thriftier is the comparative degree of thrifty.
The comparative degree for "lush" is "lusher."
The comparative degree of "light" is "lighter."
better for its comparative and best for its superlative
"Speed" is a noun and a verb and, as such, does not have a comparative degree. The comparative of the adjective speedy is speedier.
"Less" is the comparative degree of little. The superlative degree is least.
The comparative degree for "moody" is "more moody."
"More important" is the comparative degree of important.