All ace in the hole synonyms
ace in the hole
A a noun ace in the hole
- reserve — to keep back or save for future use, disposal, treatment, etc.
- trump card — Cards. trump1 (def 1a).
- ace up one's sleeve — a playing card or die marked with or having the value indicated by a single spot: He dealt me four aces in the first hand.
- card up one's sleeve — a plan or resource kept secret or held in reserve