A euphemism for "hideous" could include terms like "unattractive," "less than appealing," or "visually challenged." These phrases soften the impact of the word while conveying a similar meaning. Using such euphemisms can make criticism feel less harsh or offensive.
peculiar
Peculiar can be considered a euphemism for the other three, so that means one of the other three would not be one.
more hideous, most hideous
The word "john" is a euphemism, or substitute, for the word "toilet."
" It was hideous." " That was a hideous thing to do." "It's too hideous to be shown in public." "My drawing was hideous." Etc... You can basically make an infinite amount of sentences with the word hideous as long as you take in count of the word's actual definition; "Ugly or disgusting to look out, OR extremely unpleasant"
There are no perfect rhymes for the word euphemism.
The euphemism for "loudmouth" could be "talkative" or "vocal."
The euphemism for hate can be "dislike, detest, or loathe".
eg: You cant wear that top, it is hideous! Look at his shoes, how hideous!
The word "hideous" can be used in noun phrases by pairing it with a noun that it modifies, such as "hideous creature" or "hideous design." For example, you might say, "The artist's latest painting features a hideous creature that disturbs viewers." This usage allows "hideous" to describe the noun, emphasizing its unpleasant or grotesque qualities.
ugly like joey