solicitation, n. [request], [instance], entreaty, [invitation].
solid, a. dense, [compact], [hard], [impenetrable], [firm], [unyielding], imporous, [concrete], substantial; unanimous, [united], undivided. Antonyms: [porous], incompact, [hollow], [spongy], [soft], [plastic], [unstable], [fallacious].
solidness, n. solidity, firmness, compactness, [stability], imporosity; [validity].
soliloquy, n. [monologue].
solitary, a. unfrequented, [secluded], [lonely]; [single], individual; eremetic, hermitical.
solitary, n. [recluse], anchoret, [hermit], eremite.
solitude, n. loneliness, [isolation], [seclusion], eremitism, [retirement]; wilderness. Associated words: apanthropy, monophobia, eremophobia.
solution, n. [dissolution], [melting], liquefaction, [resolution], disintegration; disentanglement, [explanation], elucidation, explication.
solvent, n. menstruum, [dissolvent], resolvent.
somersault, n. somerset.