Firedrake and Wivern

Firedrake noun - A creature of Teutonic mythology; usually represented as breathing fire and having a reptilian body and sometimes wings.

Wivern and firedrake are semantically related. In some cases you can replace term "Wivern" with "Firedrake", this nouns are similar.

Wivern noun - A fire-breathing dragon used in medieval heraldry; had the head of a dragon and the tail of a snake and a body with wings and two legs.

Firedrake and wivern are semantically related. You can use "Firedrake" instead a noun "Wivern".