THESAURUS
permissible
OK, acceptable, admissible, all right, allowable, allowed, approved, authorized, bearable, endorsed, excusable, justifiable, kosher, lawful, legal, legit, legitimate, legitimized, licit, okay, pardonable, permitted, proper, sanctionable, sanctioned, tolerable, tolerated, unforbidden, unprohibited, venial, warrantable
ROGET THESAURUS
permissible
Permission
N
permission, leave, allowance, sufferance, tolerance, toleration, liberty, law, license, concession, grace, indulgence, favor, dispensation, exemption, release, connivance, vouchsafement, authorization, warranty, accordance, admission, permit, warrant, brevet, precept, sanction, authority, firman, hukm, pass, passport, furlough, license, carte blanche, ticket of leave, grant, charter, patent, letters patent, permitting, permissive, indulgent, permitted, patent, chartered,
permissible, allowable, lawful, legitimate, legal, legalized, licit, unforbid, unforbidden, unconditional, by leave, with leave, on leave, speciali gratia, under favor of, pace, ad libitum, by all means, yes, avec permissin, brevet d'invention.