allspice, aniseed, black pepper, 
caraway seed, cardamom, cayenne pepper, chili, cinnamon, clove, coriander, 
cumin, fenugreek, ginger, ginseng, mace, mustard, nutmeg, paprika, peppercorn, 
saffron, turmeric, white pepper
 
season, 
flavor, enhance, lace 
enliven, 
liven up, pep up (informal), lace, add zest to, add a little something to, jazz 
up (informal), season, ginger up
antonym: tone 
down