sermonizer vs preacher

sermonizer and preacher both are nouns.

Word	Noun	Adjective	Verb	Adverb
sermonizer	Yes	No	No	No
preacher	Yes	No	No	No

As nouns, sermonizer and preacher are synonyms defined as:

sermonizer and preacher: someone whose occupation is preaching the gospel

Other synonyms of sermonizer include preacher man, sermoniser.

sermonizer (noun)	preacher (noun)
someone whose occupation is preaching the gospel	someone whose occupation is preaching the gospel