I. adjective
1.
Synonyms: idealistic , idealist, visionary
Related Word: abstract, ideal, transcendental
2.
Synonyms: ambitious 2, grandiose, lofty, pretentious, visionary
Related Word: impossible, impracticable, unfeasible; arcadian, edenic, millennial, otherworldly
II. noun
Synonyms: dreamer , castle-builder, idealist, ideologue, visionary