Spacial rhymes with:
spatial, spatial, biracial, facial, glacial, interracial, multiracial, nonracial, palatial, proglacial, racial, spatial, transracial
Spacial sounds like:
savagely, sheepishly, spackle, speagle, special, speciale, specially, speckle, speegle, spegal, speziale, spiegel, spogli, spousal, subsoil, suspiciously