arson vs fire-raising

arson and fire-raising both are nouns.

Word	Noun	Adjective	Verb	Adverb
arson	Yes	No	No	No
fire-raising	Yes	No	No	No

As nouns, arson and fire-raising are synonyms defined as:

Other synonyms of arson include incendiarism.

arson (noun)	fire-raising (noun)
malicious burning to destroy property	malicious burning to destroy property