• Monstrous carbuncle, a term used to describe modernist architecture which is unsympathetic to its surroundings
• Monstrous humanoid, a creature type in the Dungeons & Dragons fantasy role-playing game
• Monstrous moonshine, a mathematical term describeing connection between the monster group M and modular functions

See also

• Monstrous Regiment
• Monstrous Regiment (novel)
• Monstrous Manual, see Monster Manual
• Monster