i Register
In some senses, mythologize is marked as archaic. Watch for register when choosing this word.
verb
To interpret (a story etc.) as mythological; to explain the symbolic meaning of.
Most of Æsopes fables have divers senses, and severall interpretations: Those which Mythologize them, chuse some kinde of colour well-suting with the fable; but for the most part, it is no more than the first and superficiall glosse[…].
To construct a myth or mythology.
To make (something or someone) into a myth; to create a legend about.