adjurar, afirmar, apoiar, aprovar, asselar, autenticar, carimbar, certificar, comprovar, confirmar, consoar, corrobar, corroborar, crismar, esforçar, firmar, legalizar, positivar, ratificar, reafirmar, referendar, revalidar, robustecer, sancionar, selar, solidar, validar, verificar
aprovar, assinar, firmar, referendar, sobscrever, subscrever, subscritar
asseelar, carimbar, selar, sigilar, timbrar