What is another word for "single"?

Roget's Thesaurus (1911) lists these synonyms for "single": abstract, ace, agamist, alone, and, apart, atomic, azygous, bachelor, bachelorhood, bachelorship, beat, blessedness, but, celibacy, combine, compact, desolate, dine, disjoin, disjunction, dreary, else, feme, first, fort, girl, half, indiscerptible, individual, individuality, indivisible, insecable, inseverable, insular, irresolvable, isolate, isolated, isolation, itself.