| Name ▲ | Type | CR | Version | Book |
|---|---|---|---|---|
| Aberrant Death's Head | Undead | 1 | 2014 | Ravenloft: The Horrors Within |
| Aberrant Zealot | Aberration | 8 | 2014 | Phandelver and Below: The Shattered Obelisk |
| Aberrant Zealot (Tentacled) | Aberration | 8 | 2014 | Phandelver and Below: The Shattered Obelisk |
| Abhorrent Overlord | Fiend | 9 | 2014 | Mythic Odysseys of Theros |
| Abigor | Fiend | 22 | 2014 | Chains of Asmodeus |
| Abjurer | Humanoid | 9 | 2014 | Volo's Guide to Monsters |
| Abjurer Archmage | Humanoid | 15 | 2014 | Unearthed Arcana |
| Abjurer Wizard | Humanoid | 9 | 2014 | Mordenkainen's Fiendish Folio |
| Aboleth | Aberration | 10 | 2014/2024 | Multiple Books (MM, XMM) |
| Aboleth Spawn | Aberration | 5 | 2014 | Critical Role: Call of the Netherdeep |