immaterial (adj.)

• adrift
• aerial
• airy
• apparitional
• astral
• bodiless
• celestial
• dinky
• disembodied
• dispensable
• ephemeral
• ethereal
• evanescent
• extraneous
• extrinsic
• fanciful
• flimsy
• foreign
• ghostly
• heavenly
• illusory
• imaginary
• impalpable
• impertinent
• imponderable
• inadmissible
• inapplicable
• inapposite
• inappreciable
• inappropriate
• incidental
• inconsequent
• inconsequential
• inconsiderable
• incorporate
• incorporeal
• inessential
• inferior
• insensible
• insignificant
• insubstantial
• intangible
• irrelevant
• light
• little
• metaphysical
• minor
• minute
• negligible
• nonessential
• nonmaterial
• nonphysical
• nugatory
• occult
• otherworldly
• out-of-the-way
• parenthetical
• petty
• phantom
• psychic
• shadowy
• slight
• small
• spiritual
• subjective
• supernatural
• technical
• transmundane
• trifling
• trivial
• unearthly
• unembodied
• unessential
• unextended
• unimportant
• unimpressive
• unreal
• unrealistic
• unsubstantial
• unworldly
• weightless