hollower, hollowest
comparative: thicker superlative: thickest
Shape is a noun and a verb and, as such, does not have a comparative or a superlative degree.
Get is a verb and does not have comparative or superlative degrees.
Most vertical is the superlative, and more vertical is the comparative.
flatter, flattest
what is the comparative and superlative of glad
What is the comparative and superlative of Often
comparative - merrier superlative - merriest
The comparative is greater and the superlative is greatest.
comparative - rockier superlative - rockiest
comparative is calmer superlative is calmest
The comparative is higher. The superlative is highest.
lovelier [comparative] loveliest [superlative]
comparative = tenderer superlative = tenderest
The comparative is grumpier and the superlative is grumpiest.
comparative straighter and the superlative the straightest
comparative: thicker superlative: thickest