Nouns

(n)ex-husband, exa man who was formerly a certain woman's husband
(n)ex-wife, exa woman who was formerly a particular man's wife“all his exes live in Texas”
(n)X, x, exthe 24th letter of the Roman alphabet

Adjectives

(s)antique, demode, ex, old-fashioned, old-hat, outmoded, passe, passeeout of fashion“a suit of rather antique appearance”, “demode (or outmoded) attire”, “outmoded ideas”