ooze vs sludge

ooze and sludge both are nouns.

Word	Noun	Adjective	Verb	Adverb
ooze	Yes	No	Yes	No
sludge	Yes	No	No	No

As nouns, ooze and sludge are synonyms defined as:

Other synonyms of ooze include goo, gook, goop, guck, gunk, muck, slime.

ooze (noun)	sludge (noun)
the process of seeping	any thick, viscous matter
any thick, viscous matter	the precipitate produced by sewage treatment

ooze (verb)	sludge (verb)
release (a liquid) in drops or small quantities
pass gradually or leak through or as if through small openings