Words So far:
Ultimate Chaosmon
Ultimate (One of the highest levels of power)
Ultimate Brachimon
Ultimate (dub for Perfect)
Unimon
Upamon
UlForceV-dramon
UlForceV-dramon Zero
UlForceV-dramon FM
Umon
UFOMamemon (later renamed to CatchMamemon)
UFO Catchers (another name for some of the plushies that are made)
Uncommon (Cards rarity)
Ultimate Battle Set (start name of several large starter sets)
Urd Terminal
Ultimate Clash (Japanese card)
Urd Terminal (Japanese Card)
Underwater Attack! (Japanese Card)
Unknown (Family type)
Unknown (Digimon Type) *it isn't just family type* ^^
Unknown (and Dark Area) families were removed from Battle Terminal and Evolve Cards
Unknown (Japanese Card Name ^^) <-- i don't remember any other Unknown now..
Uehara Minami (Tamer)
Ultra Digivolve (English Card)
Urawa Megumi (Iori and Armadimon's seiyuu)
Urazoe Kai (Tamers)
UlforceVeedramon X
Unchi (Sukamon's/Numemon's attack)
Union of Steel (Card Alpha Card)
United Booster
Ultimate Battle Deck (The other name for the Ultimate Battle Starter Sets)
Ultimate Anchor! (JP Card)
Ultimate Digivolution
Under Pressure (Dub name for a season 1 epi)
Unique (Digimon type)
Umi (i'm certain there is an album in Digimon with Umi as a song)
Undead (Yet another Deji type)
United We Stand (Dub name for a season 2 epi) <--- and not bad YGO Equip Card...
Ultimate Anti-Hero (Dub name for a season 2 epi)
Ultimate War Blade King Dragon Sword - Alphamon's weapon.
Ultimate Power! Activate Burst Mode! (Savers Movie Name)
Ultimate War Blade King Dragon Sword (JP Card)
Ultimate Feast (Japanese Card)
Ultimate Chaosmon
Ultimate (One of the highest levels of power)
Ultimate Brachimon
Ultimate (dub for Perfect)
Unimon
Upamon
UlForceV-dramon
UlForceV-dramon Zero
UlForceV-dramon FM
Umon
UFOMamemon (later renamed to CatchMamemon)
UFO Catchers (another name for some of the plushies that are made)
Uncommon (Cards rarity)
Ultimate Battle Set (start name of several large starter sets)
Urd Terminal
Ultimate Clash (Japanese card)
Urd Terminal (Japanese Card)
Underwater Attack! (Japanese Card)
Unknown (Family type)
Unknown (Digimon Type) *it isn't just family type* ^^
Unknown (and Dark Area) families were removed from Battle Terminal and Evolve Cards
Unknown (Japanese Card Name ^^) <-- i don't remember any other Unknown now..
Uehara Minami (Tamer)
Ultra Digivolve (English Card)
Urawa Megumi (Iori and Armadimon's seiyuu)
Urazoe Kai (Tamers)
UlforceVeedramon X
Unchi (Sukamon's/Numemon's attack)
Union of Steel (Card Alpha Card)
United Booster
Ultimate Battle Deck (The other name for the Ultimate Battle Starter Sets)
Ultimate Anchor! (JP Card)
Ultimate Digivolution
Under Pressure (Dub name for a season 1 epi)
Unique (Digimon type)
Umi (i'm certain there is an album in Digimon with Umi as a song)
Undead (Yet another Deji type)
United We Stand (Dub name for a season 2 epi) <--- and not bad YGO Equip Card...
Ultimate Anti-Hero (Dub name for a season 2 epi)
Ultimate War Blade King Dragon Sword - Alphamon's weapon.
Ultimate Power! Activate Burst Mode! (Savers Movie Name)
Ultimate War Blade King Dragon Sword (JP Card)
Ultimate Feast (Japanese Card)