Answer: nemesis

AnswerCrossword Clue
NEMESIS

Unbeatable opponent

NEMESIS

Goddess of vengeance

NEMESIS

Inevitable cause of downfall

NEMESIS
The Joker, to Batman
NEMESIS
Moby Dick, to Ahab
NEMESISMoriarty, to Holmes
NEMESISUnbeatable foe
NEMESISArchenemy
NEMESISSuperman, to Lex Luthor
NEMESISUnbeatable scourge
NEMESISBugs, to Elmer
NEMESISRetribution personified
NEMESISSource of harm
NEMESISVengeance deified
NEMESISDifficult opponent
NEMESISUnconquerable foe
NEMESISFormidable opponent
NEMESISRetributive justice.
NEMESISAvenger.
NEMESISRetribution.
NEMESISGoddess of retribution.
NEMESISGoddess who saw that men got their just deserts.
NEMESISInflicter of retribution.
NEMESISAn avenging power.
NEMESISGoddess of vengeance.
NEMESISGreek goddess.
NEMESISJust punishment.
NEMESISAgent of vengeance.
NEMESISRetribution
NEMESISUnbeatable rival
NEMESISJust punishment
NEMESISBane
NEMESISWaterloo
NEMESISGoddess of righteous anger
NEMESIS1989 Isaac Asimov book
NEMESISBatman, to the Joker
NEMESISFormidable foe
NEMESISBatman, to the Riddler
NEMESISWellington, to Napoleon
NEMESIS"Star Trek: ..."