ideational

valetudinarian, air-built, imaginary, fanciful, fictitious, fancied, fantastic, unrealistic, chimerical, unreal, dreamy, visionary, thoughtful, pensive, hypochondriac, spleeny, insubstantial, contemplative, meditative, romantic, cloud-built, fantastical, spectral, ideational

imaginary, unrealistic, unreal, bizarre, gothic, illusory, uncanny, illusive, ideational, vagarious

ideational