THESAURUS
dream up
beget, breed, bring forth, bring into being, call into being, coin, conceit, conceive, conceptualize, concoct, contrive, cook up, create, dense, design, develop, devise, discover, engender, evolve, experience imaginatively, fabricate, fancy, fantasize, fictionalize, formulate, frame, generate, give being to, give rise to, hatch, hatch up, ideate, imagine, improvise, invent, make do with, make up, mature, mint, mold, originate, plan, procreate, produce, shape, spawn, strike out, suppose, think out, think up, vamp up
ROGET THESAURUS
dream up
Imagination
VB
imagine, fancy, conceive, idealize, realize, dream, dream of,
dream up, give to airy nothing a local habitation and a name, create, originate, devise, invent, coin, fabricate, improvise, strike out something new, set one's wits to work, strain one's invention, crack one's invention, rack one's brains, ransack one's brains, cudgel one's brains, excogitate, brainstorm, give play, give the reins, give a loose to the imagination, give fancy, indulge in reverie, visualize, envision, conjure up a vision, fancy oneself, represent oneself, picture, picture-oneself, figure to oneself, vorstellen, float in the mind, suggest itself.