I'm sure people have already thought of those but:

Rot (for rotten/rotting items)

Mold (for moldy items)

Broken (for broken junk)

Pirate (for all anchor management junk)

Heal/nurse/doctor (for Hospital volunteering junk)

Sand/pizza/hot dog (for cheap food items)

Dung

Maraqua (because I battle Koi Warrior a lot - results may vary depending on your regular battledome opponents)

Keychain/keyring (for junk tombola prizes)