The Collaborative International Dictionary of English v.0.48:
Enhancer \En*han"cer\, n. One who enhances; one who, or that which, raises the amount, price, etc. [1913 Webster]WordNet (r) 3.0 (2006):
enhancer n 1: anything that serves by contrast to call attention to another thing's good qualities; "pretty girls like plain friends as foils" [syn: foil, enhancer]