S: (n) walker (a shoe designed for comfortable walking)
S: (n) walker, Zimmer, Zimmer frame (a light enclosing framework (trade name Zimmer) with rubber castors or wheels and handles; helps invalids or the handicapped or the aged to walk)
S: (n) walker, baby-walker, go-cart (an enclosing framework on casters or wheels; helps babies learn to walk)