pus vs purulence

pus and purulence both are nouns.

Word	Noun	Adjective	Verb	Adverb
pus	Yes	No	No	No
purulence	Yes	No	No	No

As nouns, pus and purulence are synonyms defined as:

Other synonyms of pus include festering, ichor, sanies, suppuration.

pus (noun)	purulence (noun)
a fluid product of inflammation	a fluid product of inflammation
	symptom of being purulent (containing or forming pus)