The animal, a monster, was fierce and savage.

(10 letters)

Wilderness...?

Not it twyngwyn.

 

The animal, a monster, was fierce and savage.

(10 letters)

 

_ _ _ _ _ a _ _ _ _

Dinosauric?

Sorry, no twyngwyn.

 

The animal, a monster, was fierce and savage.

(10 letters)

 

_ _ _ a _ a _ _ _ _

The animal, a monster, was fierce and savage.

(10 letters)

 

_ _ _ a _ a _ _ _ s

The animal, a monster, was fierce and savage.

(10 letters)

 

_ _ _ a _ a m _ _ s

The animal, a monster, was fierce and savage.

(10 letters)

 

_ _ _ a _ a m _ u s

Catawampus…?

Yes twyngwyn.

 

The animal, a monster, was fierce and savage.

(10 letters)

 

The animal - Cat

a - a

wampus - A strange or objectional person, a type of monster.

was fierce and savage - Cat-a-wampus. 

 

Catawampus

 

Catawampus may refer to “an imaginary fierce wild animal,” or may mean “savage, destructive.”

Merriam-Webster