Synonyms for Dreamy (same or very similar meaning)
WordNet sense 1 (lacking spirit or liveliness):
lackadaisical, languid, languorousWordNet sense 2 (deficient in alertness or activity):
lethargic, unergeticWordNet sense 3 (dreamy in mood or nature):
woolgathering, moonyFrom the ODE community, based on WordNetadd/edit