Search Result for "softener": 
Wordnet 3.0

NOUN (1)

1. a substance added to another to make it less hard;


The Collaborative International Dictionary of English v.0.48:

Softener \Sof"ten*er\, n. One who, or that which, softens. [Written also, less properly, softner.] [1913 Webster] [1913 Webster]
WordNet (r) 3.0 (2006):

softener n 1: a substance added to another to make it less hard