advocate vs sermonise

advocate is a noun but sermonise is not a noun.

Word	Noun	Adjective	Verb	Adverb
advocate	Yes	No	Yes	No
sermonise	No	No	Yes	No

As verbs, sermonise is a hyponym of advocate; that is, sermonise is a word with a more specific, narrower meaning than advocate:

Other hyponyms of advocate include moralise, moralize, preachify, sermonize.

advocate (noun)	sermonise (noun)
a person who pleads for a cause or propounds an idea
a lawyer who pleads cases in court

advocate (verb)	sermonise (verb)
push for something	speak as if delivering a sermon; express moral judgements
speak, plead, or argue in favor of