"daydreaming" in the noun sense
1. reverie, revery, daydream, daydreaming, oneirism, air castle, castle in the air, castle in Spain
absentminded dreaming while awake
"daydreaming" in the verb sense
1. dream, daydream, woolgather, stargaze
have a daydream indulge in a fantasy
2. daydream, moon
have dreamlike musings or fantasies while awake
"She looked out the window, daydreaming"
Source: WordNet® (An amazing lexical database of English)
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