anonym, anonymity, anonymous, anonymousness, camouflage, camouflaged, closed meeting, closet, concealed, confidentiality, confidentialness, cryptonymic, cryptonymous, disguise, disguised, domino, executive session, false colors, false face, false front, guisard, guiser, impersonator, in disguise, incog, incognita, inmost, innermost, innominate, interior, intimate, inward, isolated, isolation, mask, masked, masker, masque, masquerade, masquerader, masquerading, mummer, mummery, nameless, namelessness, on the sly, personal, privacy, private, private conference, privy, protective coloration, retired, retirement, secluded, seclusion, secretly, sequestered, sequestration, smoke screen, unacknowledged, undefined, under cover, undesignated, unidentified, unknown, unnamed, unrecognizable, unrecognized, unspecified, visor, vizard, vizard mask, withdrawn, without a name