Here you are:
Aerin Shield
Akaran Rondache
Akaran Targe
Alpha Helm
Ancient Shield
Antlers
Archon Plate
Ashwood Bow
Assault Helmet
Avenger Guard
Balanced Axe
Balanced Knife
Blade Bow
Blade Talons
Boneweave
Bramble Mitts
Cantor Trophy
Carnage Helm
Ceremonial Spear
Cestus
Choking Gas Potion
Circlet
Clasped Orb
Claws
Cloudy Sphere
Colossal Sword
Colossus Girdle
Colossus Voulge
Conquest Sword
Coronet
Crown Shield
Crusader Gauntlets
Crystal Sword
Crystalline Globe
Decoy Gidbinn
Demon Head
Demon Heart
Diamond Bow
Diamond Mail
Dream Spirit
Eagle Orb
Exploding Potion
Falcata
Falcon Mask
Fanged Helm
Fascia
Feral Axe
Fetish Trophy
Flying Knife
Fulminating Potion
Gargoyle Head
Ghost Spear
Ghost Wand
Giant Conch
Glaive
Glowing Orb
Gorgon Crossbow
Grand Matron Bow
Great Bow
Great Hauberk
Great Pilum
Great Poleaxe
Greater Claws
Griffon Headress
Guardian Crown
Hand Scythe
Harpoon
Hatchet Hands
Hawk Helm
Heater
Heavenly Stone
Hellforge Plate
Hellspawn Skull
Heraldic Shield
Highland Blade
Horadric Malus
Horned Helm
Hunter’s Guise
Hurlbat
Hydra Edge
Hydraskull
Hyperion
Hyperion Javelin
Jared’s Stone
Javelin
Jawbone Cap
Jawbone Visor
Katar
Lacquered Plate
Legend Sword
Lion Helm
Loricated Mail
Maiden Javelin
Maiden Pike
Maiden Spear
Matriarchal Pike
Minion Skull
Mirrored Boots
Mithral Point
Mummified Trophy
Mythical Sword
Oil Potion
Overseer Skull
Pellet Bow
Pilum
Polished Wand
Preserved Head
Protector Shield
Quhab
Rage Mask
Rancid Gas Potion
Reflex Bow
Reinforced Mace
Rondache
Royal Shield
Runic Talons
Sacred Feathers
Sacred Globe
Sacred Targe
Savage Helmet
Scarab Husk
Scissors Katar
Scissors Quhab
Scissors Suwayyah
Seraph Rod
Sexton Trophy
Shadow Bow
Shillelagh
Short Spear
Simbilan
Small Crescent
Smoked Sphere
Sparkling Ball
Spiculum
Spider Bow
Spirit Mask
Stag Bow
Stalagmite
Strangling Gas Potion
Stygian Pike
Stygian Pilum
Sun Spirit
Suwayyah
Targe
The Gidbinn
Throwing Axe
Throwing Knife
Throwing Spear
Troll Belt
Unraveller Head
Vortex Orb
Vortex Shield
Walking Stick
War Dart
War Fist
War Javelin
Wirt’s Leg
Wolf Head
Wrist Blade
Wrist Spike
Wyrmhide
Wyrmhide Boots
Zombie Head
TBH, I didn’t expect the list to be that long!
Obtained by getting all armor and weapon item codes (armor.txt, weapons.txt) and removing enabled unique items’ base item codes (uniqueitems.txt); then translated to item names and sorted. There is some noise there (such as thrown potions).
I intentionally skipped misc items, as most of them are no supposed to have unique version (rings, amulets, jewels and charms do have - but we could also have unique quivers, for example).
I could do the same for set items (setitems.txt), but the list would be much longer.