ameliorate, improve, meliorate, amend, better - to make better; "The editor improved the manuscript with his changes"

tinker, fiddle - try to fix or mend; "Can you tinker with the T.V. set--it's not working right"; "She always fiddles with her van on the weekend"

fill - plug with a substance; "fill a cavity"

patch, piece - repair by adding pieces; "She pieced the china cup"

cobble - repair or mend; "cobble shoes"

repoint, point - repair the joints of bricks; "point a chimney"

trouble-shoot - solve problems; "He is known to be good at trouble-shooting"

patch up, patch - mend by putting a patch on; "patch a hole"

resole, sole - put a new sole on; "sole the shoes"

revamp, vamp - provide (a shoe) with a new vamp; "revamp my old boots"

reheel, heel - put a new heel on; "heel shoes"

darn - repair by sewing; "darn socks"