- stumbler, tripper - a walker or runner who trips and almost falls
--1 is a kind of pedestrian, walker, footer
Derived form: verb stumble2 - bungler, blunderer, fumbler, bumbler, stumbler, sad sack, botcher, butcher, fuckup - someone who makes mistakes because of incompetence
--2 is a kind of incompetent, incompetent person
Derived form: verb stumble4