List of either synonyms and either related words.
a certain, a deux, an, any, any one, anybody, anyone, anything, atomic, aught, both, correspondingly, exclusive, for two, identically, in kind, in like manner, in that way, individual, indivisible, integral, irreducible, like, like that, like this, likewise, lone, monadic, monistic, one, similarly, simple, single, singular, so, sole, solid, solitary, tete-a-tete, the two, thus, unanalyzable, undivided, uniform, unique, unitary, whole