It’s not in my two main dictionaries yet, but beautyism has found a place in the catalogue of English words ending in -ism:
Beautyism in the Workplace: Disguised Discrimination
Jawahar and Mattsson (2005) investigated sexism and beautyism effects in employment processes using experimental research.
The suffix -ism has been a prolific source of English nouns since the Middle Ages, but this newest use, to form words that denote perceived superiority or discrimination, is fairly recent and has produced the following nouns:
ageism: Prejudice or discrimination on the grounds of a person’s age; age discrimination, especially against the elderly.
racism: prejudice and antagonism towards people of other races, especially those felt to be a threat to one’s cultural or racial integrity or economic well-being.
sexism: prejudice, stereotyping, or discrimination, typically against women, on the basis of sex.
beautyism: prejudice, stereotyping, or discrimination on the basis of physical attractiveness or lack of it.
On the Ngram chart, the word racism begins a dramatic rise in the 1930s. Sexism and ageism begin their rise at the end of the 1960s. Beautyism barely shows in comparison with the others, but is on the graph beginning in 1971. The OED added these additional definitions for the use of the suffix -ism in 2004:
a. Forming nouns with the sense ‘belief in the superiority of one [something] over another’; as racism, sexism, speciesism, etc.
b. Forming nouns with the sense ‘discrimination or prejudice against on the basis of [something]; as ageism, bodyism, heightism, faceism, lookism, sizeism, weightism, etc.
Some other uses of -ism
To form nouns that name the process or completed action of a verb in -ize:
To form nouns that name the action or conduct of a class of persons:
To form the name of a system of theory or practice, sometimes on the name of the subject or object, and sometimes on the name of its founder:
To form a noun denoting a peculiarity or characteristic, especially of language: