muckraker vs mudslinger

muckraker and mudslinger both are nouns.

Word	Noun	Adjective	Verb	Adverb
muckraker	Yes	No	No	No
mudslinger	Yes	No	No	No

As nouns, muckraker and mudslinger are synonyms defined as:

muckraker and mudslinger: one who spreads real or alleged scandal about another (usually for political advantage)

muckraker (noun)	mudslinger (noun)
one who spreads real or alleged scandal about another (usually for political advantage)	one who spreads real or alleged scandal about another (usually for political advantage)