Cretin as an alternative

The Bloom of a Tall Fescue
Over time the word cretin has become associated with the more negative meanings in box of rocks stupid. Romans blessed Christians with the word crestin or an unfortunate person, which was polite of them. And there's an iodine deficiency called cretinism which can result in congenital deficiencies among mountain people, nothing to laugh at. The dilemma here where I live is what to do with Baxter's endless use of the word retard.