The Collaborative International Dictionary of English v.0.48:

Comanches \Co*man"ches\ (? or ?), n. pl.; sing. Comanche (? or
   ?). (Ethnol.)
   A warlike, savage, and nomadic tribe of the Shoshone family
   of Indians, inhabiting Mexico and the adjacent parts of the
   United States; -- called also Paducahs. They are noted for
   plundering and cruelty.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Paducahs \Pa*du"cahs\ (p[.a]*d[=u]"k[.a]z), n. pl.; sing.
   Paducah (-k[.a]). (Ethnol.)
   See Comanches.
   [1913 Webster]