more fearful, most fearful
The comparative and superlative degrees of clean are cleaner and cleanest.
out
Get is a verb and does not have comparative or superlative degrees.
Comparative and superlative degrees are for adjectives and adverbs. House can be used as a noun or a verb and does not have comparative or superlative forms.
more in, most in
more out, most out
more in, most in
The three degrees (of comparison) for adjectives are Positive, Comparative and Superlative. Example: hard (positive) harder (comparative) hardest (superlative)
The comparative and superlative degrees of "white" are formed in the standard way: "whiter" and "whitest" respectively.
greater & greatest
finer, finest
fewer, fewest