serialism vs serial music

serialism and serial music both are nouns.

Word	Noun	Adjective	Verb	Adverb
serialism	Yes	No	No	No
serial music	Yes	No	No	No

As nouns, serialism and serial music are synonyms defined as:

serialism and serial music: 20th century music that uses a definite order of notes as a thematic basis for a musical composition

serialism (noun)	serial music (noun)
20th century music that uses a definite order of notes as a thematic basis for a musical composition	20th century music that uses a definite order of notes as a thematic basis for a musical composition