ineffable (adj.)
- abstract
- awesome
- awful
- celestial
- divine
- empyreal
- empyrean
- ethereal
- exceptional
- extraordinary
- fabulous
- heavenly
- holy
- ideal
- indefinable
- indescribable
- inexpressible
- inviolable
- inviolate
- legendary
- marvelous
- mythical
- noncommunicable
- noteworthy
- numinous
- phenomenal
- portentous
- prodigious
- religious
- remarkable
- sacred
- sacrosanct
- spiritual
- stupefying
- stupendous
- transcendent
- transcendental
- undefinable
- unexampled
- unmentionable
- unnameable
- unparalleled
- unprecedented
- unspeakable
- untellable
- untouchable
- unutterable
- venerable
- wonderful
