The Oxford Thesaurus An A-Z Dictionary of Synonyms - imaginationn.

1) mind's eye, fancy; creativity, inventiveness, ingenuity, insight, inspiration, vision, imaginativeness, creative power(s) : His fertile imagination conjured up all kinds of terrifying pictures. 2) thought, thinking, (mental) acuity, intelligence, wit: It doesn't take much imagination to see why you don't want to go to school this morning.