The Collaborative International Dictionary of English v.0.48:
Whirler \Whirl"er\, n. One who, or that which, whirls. [1913 Webster]WordNet (r) 3.0 (2006):
whirler n 1: a dervish whose actions include ecstatic dancing and whirling [syn: whirling dervish, whirler] 2: a revolving mechanism