Jazz up is a phrase that means to make something more interesting or exciting. The crossword solutions for this phrase are HOKE (4 letters), SPICE (5 letters), LIVEN (5 letters), IMPROVE (7 letters), INVIGORATE (10 letters), EXCITE (6 letters), and ENLIVEN (7 letters). Each of these words has a similar meaning to jazz up, but they all have slightly different connotations. HOKE is a slang term that means to make something more lively or entertaining. SPICE implies adding flavor or interest to something. LIVEN suggests making something more active or energetic. IMPROVE implies making something better or more effective. INVIGORATE suggests making something more lively or vigorous. EXCITE implies making something more thrilling or stimulating. ENLIVEN implies making something more cheerful or animated.