for the two words share the letters s and t, and t and d are closely related consonants. The verb samata (to remain silent) has the verbal nouns sumāt and sumūt, while asmata has ismāt. This involves gathering and drawing together, as opposed to opening and separation. Hence bones and other bodies are described as either hollow or solid.
It thus becomes clear that His name al-Ahad (the One) entails His transcendence above everything that must be denied of Him: being likened to others or anything else resembling Him in any respect. His name al-Samad entails His transcendence above everything that must be denied of Him, such as division, separation, and anything else incompatible with the perfection of His being al-Samad. Glorified and exalted is He, far above what the wrongdoers say.
As for what the negators of His attributes add to this—denying the attributes with which He has described Himself, whose denial they regard as affirming His transcendence and whose affirmation they regard as likening Him to creation; and denying His limit, His being above His Throne, and all the other attributes with which He has described Himself—they regard their denial as affirming His transcendence, and regard affirming them as affirming His division