columba

As nouns the difference between lizard and columba

is that lizard is any reptile of the order squamata, usually having four legs, external ear openings, movable eyelids and a long slender body and tail while columba is dove, pigeon (sacred bird of venus).

Varanus is likely misspelled.

Varanus has no English definition.

As a proper noun Columba is

St. Columba of Iona, one of the Gaelic missionary monks who reintroduced Christianity to Scotland during the Dark Ages.