Synonyms to either

any, a, a certain, all, all and some, all and sundry, an, any one, anybody, anyone, anything, atomic, aught, certain, each, each and all, each and every, each one, every, every one, exclusive, individual, indivisible, integral, irreducible, lone, measured, monadic, monistic, one, one and all, quantified, quantitative, quantitive, quantized, simple, single, singular, sole, solid, solitary, some, something, somewhat, unanalyzable, undivided, uniform, unique, unitary, whole, atomatic, atomiferous, atomistic, corpuscular, cyclic, diatomic, dibasic, embryonic, evanescent, germinal, granular, heteroatomic, heterocyclic, hexatomic, homocyclic, impalpable, imperceptible, imponderable, inappreciable, indiscernible, infinitesimal, intangible, invisible, isobaric, isocyclic, isoteric, isotopic, microcosmic, microscopic, molecular, monatomic, pentatomic, subatomic, tenuous, tetratomic, thin, triatomic, tribasic, ultramicroscopic