(feminine) reservation, booking (arrangement by which accommodation or transport arrangements are secured in advance)
(feminine) a reserve, reservation, preserve, sanctuary (area protected for a specific reason)
(feminine) reserve (for game or hunting)
(feminine) reserve (armed forces in non-active duty)
(feminine) reserve (part of the team that doesn't start)
(feminine) reserve, supply, stock, stockpile, store, standby (something saved for future use)
(feminine) pool (e.g. talent pool, gene pool, pool of experts, pool of available workers)
(feminine) secrecy (i.e. discretion, confidence)
(feminine,formal) caveat