THESAURUS
fiat
appointment, authority, authorization, brevet, bull, certification, clearance, countenance, declaration, decree, decree-law, decreement, decretal, decretum, dictum, diktat, edict, edictum, empowerment, enabling, endorsement, enfranchisement, entitlement, ipse dixit, law, ordinance, ordonnance, proclamation, pronouncement, pronunciamento, ratification, rescript, rule, ruling, sanction, senatus consult, senatus consultum, ukase, warrant, warranty
ROGET THESAURUS
fiat
Command
N
command, order, ordinance, act,
fiat, hukm, bidding, dictum, hest, behest, call, beck, nod, despatch, dispatch, message, direction, injunction, charge, instructions, appointment, fixture, demand, exaction, imposition, requisition, claim, reclamation, revendication, ultimatum, request, requirement, dictation, dictate, mandate, caveat, decree, senatus consultum, precept, prescript, rescript, writ, ordination, bull, ex cathedra pronouncement, edict, decretal, dispensation, prescription, brevet, placit, ukase, ukaz, firman, hatti- sherif, warrant, passport, mittimus, mandamus, summons, subpoena, nisi prius, interpellation, citation, word, word of command, mot d'ordre, bugle call, trumpet call, beat of drum, tattoo, order of the day, enactment, plebiscite, commanding, authoritative, decretory, decretive, decretal, callable, jussive, in a commanding tone, by a stroke of the pen, by a dash of the pen, by order, at beat of drum, on the first summons, the decree is gone forth, sic volo sic jubeo, le Roi le veut, boutez en avant.