The Collaborative International Dictionary of English v.0.48:
Seasoner \Sea"son*er\, n. One who, or that which, seasons, or gives a relish; a seasoning. [1913 Webster]WordNet (r) 3.0 (2006):
seasoner n 1: a cook who uses seasonings; "the cook is a light seasoner" 2: something added to food primarily for the savor it imparts [syn: flavorer, flavourer, flavoring, flavouring, seasoner, seasoning]