What is another word for "atomic"?

Roget's Thesaurus (1911) lists these synonyms for "atomic": abstract, ace, alone, and, ant, apart, azygous, beat, but, cartilage, cartilaginous, cement, cohesion, combine, compact, coriaceous, desolate, dine, disjoin, disjunction, dreary, else, first, fort, fracture, glue, glutinousness, grasp, grip, gristle, gristly, half, indiscerptible, individual, individuality, indivisible, insecable, inseverable, insular, irresolvable.