Synonyms to between us

auricular, acoustic, audible, audile, audio, auditory, aural, confidential, esoteric, hearing, in petto, inside, not for publication, off the record, otic, otological, otopathic, otoscopic, phonic, privileged, sealed, under privilege, unpublishable, chummy, classified, close, closet, hush-hush, hushed, intimate, private, secret, thick, tried, trustworthy, trusty, absolute, abstract, abstruse, anagogic, arcane, between the lines, cabalic, cabalistic, censored, certain, closed, concealed, concrete, covert, cryptic, dark, deep, deep-seated, defined, definite, delitescent, detailed, determinate, different, distinct, distinguished, dormant, eerie, enigmatic, especial, exceptional, express, extramundane, extraordinary, extraterrestrial, fey, fixed, heavy, hermetic, hibernating, hidden, hypernormal, hyperphysical, immanent, implanted, implicit, inalienable, individual, i