comeupance vs just deserts

comeupance and just deserts both are nouns.

Word	Noun	Adjective	Verb	Adverb
comeupance	Yes	No	No	No
just deserts	Yes	No	No	No

As nouns, comeupance and just deserts are synonyms defined as:

comeupance and just deserts: an outcome (good or bad) that is well deserved and fitting

Other synonyms of comeupance include comeuppance, poetic justice.

comeupance (noun)	just deserts (noun)
an outcome (good or bad) that is well deserved and fitting	an outcome (good or bad) that is well deserved and fitting