Synonyms for unobservable
adj imperceptibleimponderable
adjective. imperceptible
inappreciable
adjective. imperceptible
intangible
adjective. indefinite, obscured
invisible
adjective. unable to be seen; hidden
- concealed
- covert
- deceptive
- disguised
- ethereal
- gaseous
- ghostly
- ideal
- impalpable
- imperceptible
- imponderable
- inappreciable
- inconspicuous
- indiscernible
- infinitesimal
- insensible
- intangible
- masked
- microscopic
- not in sight
- obliterated
- obscured
- occult
- out of sight
- perdu
- screened
- supernatural
- ulterior
- unapparent
- undisclosed
- ungraspable
- unnoticeable
- unobservable
- unperceivable
- unreal
- unseeable
- unseen
- unviewable
- vaporous
- veiled
- wraithlike
unnoticeable
adjective. imperceptible
Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the
Philip Lief Group.