ethicism vs school of thought

ethicism and school of thought both are nouns.

Word	Noun	Adjective	Verb	Adverb
ethicism	Yes	No	No	No
school of thought	Yes	No	No	No

As nouns, school of thought is a hypernym of ethicism; that is, school of thought is a word with a broader meaning than ethicism:

ethicism: a doctrine that ethics and ethical ideas are valid and important
school of thought: a belief (or system of beliefs) accepted as authoritative by some group or school

Other hypernyms of ethicism include doctrine, ism, philosophical system, philosophy.

ethicism (noun)	school of thought (noun)
a doctrine that ethics and ethical ideas are valid and important	a belief (or system of beliefs) accepted as authoritative by some group or school