slaughter vs bloodbath

slaughter and bloodbath both are nouns.

Word	Noun	Adjective	Verb	Adverb
slaughter	Yes	No	Yes	No
bloodbath	Yes	No	No	No

As nouns, bloodbath is a hyponym of slaughter; that is, bloodbath is a word with a more specific, narrower meaning than slaughter:

Other hyponyms of slaughter include battue, bloodletting, bloodshed.

slaughter (noun)	bloodbath (noun)
the killing of animals (as for food)	indiscriminate slaughter
the savage and excessive killing of many people
a sound defeat

slaughter (verb)	bloodbath (verb)
kill a large number of people indiscriminately
kill (animals) usually for food consumption