NOUN (2)

1. a custodian who is hired to take care of something (property or a person);

2. an official who performs the duties of an office temporarily;
- Example: "he acted as a caretaker until a new president could be elected"

Moby Thesaurus II by Grady Ward, 1.0:

23 Moby Thesaurus words for "caretaker":
   air warden, attendant, castellan, conservator, curator, custodian,
   forest ranger, game warden, gamekeeper, governor, guardian,
   guardian angel, janitor, keeper, lifeguard, lifesaver, next friend,
   prochein ami, ranger, shepherd, steward, warden, warder