Cases of word usage

1) in the state of needing repair (disrepair)

2) to keep or continue (something) at a certain level; to keep (a machine, building etc) in good repair or working order (maintain)

3) an examination to discover and repair faults (overhaul)

4) a worker who repairs kettles, pans etc; to try to repair something without knowledge or skill (tinker)

5) (the cost of) keeping something in good order and repair (upkeep)

6) a (written or printed) guarantee (e.g. to repair or replace defective goods) (warranty)