Originally Posted by
Blasphemous
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My belief has always been that dragons are more like lizards (4 limbs) with wings while wyrms are closer to snakes, with no appendages.
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This is the common understanding. Also supported by https://en.m.wiktionary.org/wiki/wyrm:
Noun
wyrm (plural wyrms)
1. (mythology) A huge limbless and wingless serpent
2. (fantasy) A vague term, but it usually refers to huge limbless and wingless serpents
3. (synonym) A sea serpent
The monster descriptions were a community effort however, so they're inconsistent by default. But I think that's one of the things that makes ADOM so special, because it shows how it managed to inspire people to contribute early on.
gremlin - karmic lizard, dark orc, acid vortex, staring eye - dragon turtle, fairy dragon, ogre lord, minotaur emperor - pit viper, orc butcher - greater mimic, dark elven wizard, carrion crawler, dwarven child - imp - ochre jelly, dark elven archer, king cobra, goodwife - kobold shaman, magebane eye, floating eye, quickling king - giant centipede, hill orc sergeant, mimic hivemind, greater claw bug, brown bear, large gnoll - giant bee queen, giant ant warrior, shadow centipede, kobold