sermoniser vs man of the cloth

sermoniser and man of the cloth both are nouns.

Word	Noun	Adjective	Verb	Adverb
sermoniser	Yes	No	No	No
man of the cloth	Yes	No	No	No

As nouns, man of the cloth is a hypernym of sermoniser; that is, man of the cloth is a word with a broader meaning than sermoniser:

sermoniser: someone whose occupation is preaching the gospel
man of the cloth: a member of the clergy and a spiritual leader of the Christian Church

Other hypernyms of sermoniser include clergyman, reverend.

sermoniser (noun)	man of the cloth (noun)
someone whose occupation is preaching the gospel	a member of the clergy and a spiritual leader of the Christian Church