| No. | Term | Definition |
|---|---|---|
| 1. | A.I.M. | Advanced Idea Mechanics, mad scientists. |
| 2. | Adamantium | Nearly unbreakable metal alloy. |
| 3. | Age of Apocalypse | Alternate timeline ruled by Apocalypse. |
| 4. | Alpha Flight | Canada’s premier superhero team. |
| 5. | Annihilation Wave | Ravenous army from Negative Zone. |
| 6. | Apocalypse | Ancient mutant believing in survival. |
| 7. | Arc Reactor | Stark’s clean power source. |
| 8. | Asgard | Realm of Norse gods. |
| 9. | Avengers | Earth’s mightiest heroes team. |
| 10. | Avengers Tower | Avengers’ iconic headquarters. |
| 11. | Baxter Building | Fantastic Four’s headquarters. |
| 12. | Beta Ray Bill | Worthy alien wielder of Stormbreaker. |
| 13. | Blackbird | X-Men’s stealth jet. |
| 14. | Blip | Mass return after Snap reversal. |
| 15. | Bucky Barnes | Captain America’s friend, Winter Soldier. |
| 16. | Cable | Time-traveling mutant soldier. |
| 17. | Captain Marvel | Cosmic hero with photon powers. |
| 18. | Carnage | Killer symbiote bonded to Kasady. |
| 19. | Celestials | Godlike cosmic creators and judges. |
| 20. | Chitauri | Alien army invading Earth. |
| 21. | Civil War | Hero conflict over registration. |
| 22. | Cloak and Dagger | Duo with darkness and light. |
| 23. | Cosmic Cube | Reality-warping artifact of immense power. |
| 24. | Daredevil | Blind vigilante with heightened senses. |
| 25. | Dark Dimension | Mystic realm ruled by Dormammu. |
| 26. | Dark Phoenix | Corrupted Phoenix power in Jean. |
| 27. | Deadpool | Wisecracking mercenary with healing factor. |
| 28. | Doctor Doom | Latverian tyrant and genius sorcerer. |
| 29. | Dormammu | Dark Dimension’s dread ruler. |
| 30. | Ego | Living planet and Celestial. |
| 31. | Eternals | Immortal beings created by Celestials. |
| 32. | Excalibur | British mutant superhero team. |
| 33. | Fantastic Four | Marvel’s first family of heroes. |
| 34. | Fisk Tower | Kingpin’s power base in NYC. |
| 35. | Future Foundation | Fantastic Four’s science-focused initiative. |
| 36. | Galactus | World-devouring cosmic entity. |
| 37. | Gamma radiation | Source of Hulk-like mutations. |
| 38. | Groot | Flora colossus, says ‘I am Groot’. |
| 39. | Guardians of the Galaxy | Misfit team protecting the cosmos. |
| 40. | H.E.L.L.F.I.R.E. Club | Elite group manipulating mutants. |
| 41. | H.Y.D.R.A. | Secret fascist organization opposing SHIELD. |
| 42. | Helicarrier | SHIELD’s massive flying aircraft carrier. |
| 43. | Hell’s Kitchen | Daredevil’s New York neighborhood. |
| 44. | Hulk | Gamma-powered green rage monster. |
| 45. | Infinity Gauntlet | Glove wielding all Infinity Stones. |
| 46. | Infinity Stones | Six artifacts controlling aspects of reality. |
| 47. | Inhumans | Terrigen-altered superhuman society. |
| 48. | Iron Fist | Martial artist with chi-powered fist. |
| 49. | J. Jonah Jameson | Daily Bugle editor, hates Spider-Man. |
| 50. | Jean Grey | Powerful mutant, host of Phoenix. |
| 51. | Juggernaut | Unstoppable avatar of Cyttorak. |
| 52. | Kang the Conqueror | Time-traveling warlord and strategist. |
| 53. | Klyntar | Homeworld species name for symbiotes. |
| 54. | Krakoa | Living mutant island and nation. |
| 55. | Kree | Militaristic blue-skinned alien empire. |
| 56. | Latveria | Doctor Doom’s European homeland. |
| 57. | Life Model Decoy | LMD robot duplicate of a person. |
| 58. | Loki | Asgardian trickster god. |
| 59. | M’Kraan Crystal | Nexus of realities, Shi’ar artifact. |
| 60. | Madripoor | Lawless island haven for criminals. |
| 61. | Magneto | Mutant master of magnetism. |
| 62. | Mantis | Empathic Guardian with antennae. |
| 63. | Marvel Zombies | Universe of infected hero cannibals. |
| 64. | Mjølnir | Thor’s enchanted hammer. |
| 65. | Morbius | Living vampire antihero scientist. |
| 66. | Multiverse | Collection of alternate universes. |
| 67. | Nexus of All Realities | Gateway point connecting universes. |
| 68. | Nick Fury | Spymaster leading SHIELD. |
| 69. | Nova Corps | Xandar’s interstellar police force. |
| 70. | Odin | All-Father ruler of Asgard. |
| 71. | Omega-level mutant | Mutant with limitless power potential. |
| 72. | Onslaught | Psionic entity born from Xavier, Magneto. |
| 73. | Oscorp | Norman Osborn’s tech corporation. |
| 74. | P.E.G.A.S.U.S. | Project studying energy and space. |
| 75. | Parker luck | Spider-Man’s chronic bad fortune. |
| 76. | Phoenix Force | Cosmic entity of life and rebirth. |
| 77. | Planet Hulk | Hulk exiled, becomes gladiator king. |
| 78. | Power Stone | Infinity Stone granting immense strength. |
| 79. | Quantum Realm | Subatomic dimension enabling time travel. |
| 80. | Quinjet | SHIELD’s high-tech jet aircraft. |
| 81. | Reality Stone | Infinity Stone altering matter and reality. |
| 82. | Red Room | Soviet program training Black Widows. |
| 83. | Reed Richards | Mr. Fantastic, elastic genius leader. |
| 84. | Rogue | Mutant absorbing powers by touch. |
| 85. | S.H.I.E.L.D. | Global espionage and defense agency. |
| 86. | Sakaar | Planet where Hulk was enslaved. |
| 87. | Savage Land | Antarctic prehistoric jungle region. |
| 88. | Secret Invasion | Skrulls infiltrate Earth as impostors. |
| 89. | Sentinels | Robots built to hunt mutants. |
| 90. | Skrulls | Shape-shifting alien species. |
| 91. | Snap | Thanos halves life with Gauntlet. |
| 92. | Sokovia Accords | UN oversight law for superheroes. |
| 93. | Spider-Sense | Precognitive danger warning ability. |
| 94. | Spider-Verse | Multiversal Spider-people crossover. |
| 95. | Stark Industries | Tony Stark’s weapons and tech company. |
| 96. | Symbiote | Alien suit bonding with a host. |
| 97. | Tesseract | Cube housing the Space Stone. |
| 98. | The Raft | High-security prison for superhumans. |
| 99. | Time Stone | Infinity Stone controlling time. |
| 100. | Uatu the Watcher | Observer sworn not to interfere. |