Damn, let's go through almost everything on the list:
Castle
1. Archers - Archers
2. Griffins - Birdies
3. Crusaders - Crosses
4. Riders - Horses
5. Archangels - Archs

Rampart
1. Centaur - Kent
2. Elves - Archers
3. Dendroids - Dends
4. Unicorns - Horses
5. Dragons - Drakis

Tower
1. Gargoyle - Garga

Inferno
1. Hounds - Doggies
2. Fiend - Whipper

Dungeon
1. Troglodytes - Zalupikis:D
2. Beholders - Eyeballs
3. Minotaurs - Mines, Minoses
4. Skorpiokorns - Skorps

Necropolis
1. Skeletons - Skellys
2. Zombies - Zombies
3. Guardians - Spirit
4. Vampires - Vamps, Bloodsucker
5. Black Knights - Horses
6. Skeleton Dragon - Rubble

Stronghold
1. Wolf Riders - Doggies/Wolves
2. Rukh Birds - Birdies
3. Behemoths - Bigis

Fortress
1. Gnolls - Doggies
2. Serpents - Flies
3. Basilisks - Vaskis
4. Gorgons - Cowgirls

Conflux

1. Fairies - Butterflies
2. Firebirds - Birdies
And all elementals are named after their element
for example, Fire Elemental - Fire

Special attention should also be paid to a few more things
Explosion spell - Break the egg (probably been called that for about 8 years)
Bad morale triggered - the birdie pooped
Helmet +6 to stats - Teapot
Sphere of Suppression - p*d*a