ichor vs pus

ichor and pus both are nouns.

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

As nouns, ichor and pus are synonyms defined as:

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

ichor (noun)	pus (noun)
a fluid product of inflammation	a fluid product of inflammation
(Greek mythology) the rarified fluid said to flow in the veins of the Gods