When you are in a polyform with a hug attack and attack a monster with it, there is a chance the monster appreciates the hug and becomes peaceful.

Convicts can sometimes pacify the Rat King by chatting to him, similar to how they can tame rats by chatting.

You can tame (or at least pacify) hostile dwarves by throwing potions of booze at them, which they catch.

Charm monster is generally considered too powerful and too low-level, and should probably be nerfed. Ideas:

• It only works if you’re not wearing any armor. (This is apparently how D&D does it.) Alternatively, its chance of successfully charming is reduced the more armor you’re wearing.
• Make it more reliable than it is now, but it always fails if you have other pets. (You can then only have one pet at a time without using scrolls of taming.)
• It only tames one monster at a time. (Make it a directional beam with a maximum range of 1.)
• It only pacifies monsters, and can’t be used to tame an always-hostile monster.
• Make it do what the temporary pet code in the Bard patch does: the monster remains tame for a fairly short amount of time and then reverts to whatever it was originally.
• Split into three spells: pacify monster (peaceful for charisma*2 turns), charm monster (tame for Charisma*2 turns), and dominate monster (tame permanently or for a long time).
• It only works on monsters, and doesn’t work on intelligent beings.
• It can’t directly tame a hostile monster; it can only pacify it. Peaceful monsters can then be tamed by subsequent casts, but attempting to tame a peaceful intelligent monster may anger it instead. The pacification step is dependent only on monster MR, but the taming depends on the player’s level relative to the target. The scroll of taming should remain comparatively powerful.
• Scale with skill: unskilled attempts to pacify one adjacent monster, basic to pacify all adjacent, skilled to tame one adjacent, and expert to tame all adjacent. All of these are subject to normal monster MR checks.
• Whatever nerfs do get applied, they should ensure that the scroll of taming is more powerful and reliable than the spell.

Amulet of Storms, an artifact amulet of flying that additionally grants shock resistance when worn, and allows you to pacify true v monsters (i.e. not alternative forms of other monsters that happen to be turned into a vortex as a defined alternative form, such as vampires and the Wizard of Yendor, but counting shapechangers such as chameleons) when chatting to them.

New artifact Apiarist’s Veil, a cloth hat, perhaps an elven helm or fedora, that gives warning of all insects and pacifies nearby bees.

Freeing any hostile monster from a cage of iron bars has a chance of pacifying it.

Differentiate the neutral alignment by making it not really about killing. Instead, neutrals get rewarded for forcing monsters to back down, surrender, and get left alone peacefully. (Sapient monsters will beg or gesture for mercy when brought down to sufficiently low HP; non-sapient monsters will produce some other message). To keep loot fairly balanced, a monster that surrenders will drop its gear.

There should be a message from when you pacify (not tame) a monster by throwing food at it. “[monster] seems pacified by your gesture”; possibly something about you getting the monster’s order wrong if you’re hallucinating.

The non-cursed scroll of taming always pacifies monsters that can be pacified but not tamed (shopkeepers, priests, watchmen). If blessed, the pacification is extended to all monsters that can be pacified at all (nearly everything, except a few uniques). The MR roll to tame monsters is unaffected.

When something infects you with lycanthropy, the infector and all of its summoned monsters become peaceful.

Throwing a treat at most non-domestic d or f will make them devour it, and will often pacify them and occasionally tame them.

Foocubi can be pacified or tamed by throwing a ring of adornment at them.

Most d and f monsters can be pacified, but not tamed, by throwing appropriate food at them (they will eat it, so you can’t reuse the same food item).

Wishing for “world peace” pacifies all non-unique monsters on the level, possibly subject to monster resistances.

Rangers can chat to certain animalistic monsters to calm them and make them peaceful (but not tame). Possibly generalize this into a skill that can be achieved by Cavemen, Monks and Tourists too.

Tigers have a small chance of being pacified if you apply a whip on them.

Certain monsters (intelligent ones like Elvenkings that are smart enough to realize you probably will kill them) turn peaceful or generate peaceful depending on your XL.