Synonyms of the word

immaterial

• adj. Having no matter or substance.
• adj. (law, accounting) So insubstantial as to be irrelevant.

bodiless

• adj. Lacking a body; incorporeal.

discorporate

• v. (intransitive) to leave one's physical body, such as through metaphysical or drug-induced means.
• adj. Having no material body.
• adj. Not being a member of a corporate body.

disembodied

• v. simple past tense and past participle of disembody.
• adj. Having no material body, immaterial; incorporeal or insubstantial.

extraneous

• adj. Not belonging to, or dependent upon, a thing; without or beyond a thing; foreign.
• adj. Not essential or intrinsic.

impertinent

• adj. insolent, ill-mannered.
• adj. irrelevant (opposite of pertinent).
• n. An impertinent individual.

incorporeal

• adj. Having no material form or physical substance.
• adj. (law) Relating to an asset that does not have a material form; such as a patent.

indifferent

• adj. Not caring or concerned; uninterested, apathetic.
• adj. Mediocre, usually used negatively in modern usage.
• adj. Having no preference or bias, being impartial.
• adj. Not making a difference; without significance or importance.
• adj. (mechanics) Being in the state of neutral equilibrium.
• adv. (obsolete) To some extent, in some degree (intermediate between very and not at all); moderately, tolerably,…

insubstantial

• adj. Lacking substance; not real or strong.

intangible

• adj. incapable of being perceived by the senses; incorporeal.
• n. Anything intangible.
• n. (law) Incorporeal property that is saleable though not material, such as bank deposits, stocks, bonds,…

irrelevant

• adj. Not related, not applicable, unimportant, not connected.

nonmaterial

• adj. Not material; apart from matter.

nonphysical

• adj. not physical; not using kinetic energy.
• adj. not having physical form; insubstantial.

orthogonal

• adj. (geometry) Of two objects, at right angles; perpendicular to each other.
• adj. (mathematics).
• adj. (statistics) Statistically independent, with reference to variates.
• adj. (software engineering) Of two or more aspects of a problem, able to be treated separately.
• adj. Of two or more problems or subjects, independent of or irrelevant to each other.

spiritual

• adj. Of or pertaining to the spirit or the soul.
• adj. Of or pertaining to God or a place of worship; sacred.
• adj. Of or pertaining to spirits; supernatural.
• adj. Consisting of spirit; not material; incorporeal.
• adj. Of or relating to the intellectual and higher endowments of the mind; mental; intellectual.
• adj. (Christianity) Controlled and inspired by the Holy Spirit; pure; holy.
• adj. Not lay or temporal; relating to sacred things; ecclesiastical.
• n. A Christian religious song, especially one in an African-American style, or a similar non-religious song.
• n. Any spiritual function, office, or affair.

unbodied

• adj. (archaic) disembodied; without a body; separated from the body.

unembodied

• adj. (of a soul, spirit, or other such essence so conceived) Incorporeal; not possessed of a body.
• adj. (especially of armed multitudes) Not united in a regimented structure; lacking structure and order.
• adj. Existing or operating without involvement by the body; solely mental or intellectual; “ungrounded”, “heady”.

unimportant

• adj. petty; not important or noteworthy.

unreal

• adj. fake; not real.
• adj. (slang) larger or more fantastic than typical of real life.

unsubstantial

• adj. (archaic) Alternative form of insubstantial.