Interregno.
n.The time during which a throne is vacant between the death or abdication of a sovereign and the accession of his successor. Any period during which, for any cause, the executive branch of a government is suspended or interrupted
n.interim generic term, meantime generic term, meanwhile generic term, lag generic term
Vogais: ieeu
Consoantes: ntrrgnm
interreign, intercom, intercession, interjoin, interknow, introsume, interchain, intercommon, intercommune, intorsion.