List of one by one synonyms and one by one related words.
adrift, alone, apart, apart from, apiece, aside from, asunder, away from, by itself, each, each to each, in the abstract, in the singular, in twain, in two, independently, individually, once, particularly, per annum, per capita, per se, piecemeal, respectively, separately, severally, single-handedly, singly, singularly