Question

Are the words beautifuler and beautifulest accepted as the comparative and superlative degree of beautiful?

Answer 1

These words could only be accepted if you try them in literature for creating a entirely different atmosphere. But if in grammar then sorry dude you may get nothing for this.
Thank You

Answer 2

While beautiful is a word and the suffix -est can be added to the end of various adjectives to make them superlative and comparative, 'beautifulest' and ‘beautifuler’ are not words.

That's because 'beautifulest' and ‘beautifuler’ does not adhere to the rules when it comes to making an adjective a superlative or comparative.

Per superlative and comparative rules, adjectives that have two or more syllables should not have the an '-est.’ or ‘-er’. Instead, the word 'most' and ‘more’ should be placed in front of the adjective. Thus, instead of 'beautifulest’ and ‘beautifuler’, the phrases ‘most beautiful' and ‘more beautiful’ should be used respectively.