As a two-syllable adjective ending in a consonant sound, it is uncommon to use a single word to refer to the comparitive and superlative - such as you would use the words "rich", "richer" and "richest". It is much more acceptable to use the words "handsome", "more handsome", and "most handsome", in this situation.
The comparative and superlative forms of handsome are more handsome and most handsome.
handsomer, handsomest
superlative handsome-most handsomecomparative handsome-more handsome
more handsome and most handsome
more handsome, most handsome
handsomer, handsomest
handsomer, handsomest
more handsome most handsome
handsomer, handsomest
handsomer, handsomest
The superlative is cloudiest; the comparative is cloudier.
Comparative: uglier Superlative: ugliest