1) Abstractedness 2) Abstraction 3) Reverie 1) Daydream 2) Daydreaming 3) Oneirism 4) Reverie 
• (n.) An extravagant conceit of the fancy; a vision. • (n.) Same as Reverie. • (n.) A loose or irregular train of thought occurring in musing or mediation; deep musing; daydream.
Origin: F. Reverie, fr. Rever to dream, rave, be light-headed. Cf. Rave. ... 1. A loose or irregular train of thought occurring in musing or mediation; deep musing; daydream. 'Rapt in nameless reveries.' 'When ideas float in our mind without any reflection or regard of the understanding, it is that which the French call revery, our language has sca...
Rev'er·y noun Same as Reverie . 
daydreaming noun absentminded dreaming while awake