fattism vs discrimination

fattism and discrimination both are nouns.

Word	Noun	Adjective	Verb	Adverb
fattism	Yes	No	No	No
discrimination	Yes	No	No	No

As nouns, discrimination is a hypernym of fattism; that is, discrimination is a word with a broader meaning than fattism:

fattism: discrimination against people who are overweight
discrimination: unfair treatment of a person or group on the basis of prejudice

Other hypernyms of fattism include favoritism, favouritism.

fattism (noun)	discrimination (noun)
discrimination against people who are overweight	unfair treatment of a person or group on the basis of prejudice
	the cognitive process whereby two or more stimuli are distinguished