The term 'reservation' can be defined in many ways, and the following crossword solutions provide a variety of interpretations. SCRUPLE (7 letters) is defined as a feeling of DOUBT or hesitation with regard to the morality or propriety of a course of action. QUALM (5 letters) is a feeling of uneasiness or apprehension about the outcome of something. CONSTRAINT (10 letters) is a restriction or limitation on one's freedom of action. PROVISO (7 letters) is a condition or stipulation attached to an agreement. UNCERTAINTY (11 letters) is a state of not being certain or definite. HOLD (4 letters) is to keep or retain possession of something. DOUBT (5 letters) is a feeling of UNCERTAINTY or lack of conviction. BOOKING (7 letters) is the act of reserving or making a reservation. All of these words can be used to describe the concept of reservation in some way.