S: (n) force (force%1:07:00::), forcefulness (forcefulness%1:07:00::), strength (strength%1:07:06::) (physical energy or intensity) "he hit with all the force he could muster"; "it was destroyed by the strength of the gale"; "a government has not the vitality and forcefulness of a living man"
S: (n) persuasiveness (persuasiveness%1:07:00::), strength (strength%1:07:09::) (the power to induce the taking of a course of action or the embracing of a point of view by means of argument or entreaty) "the strength of his argument settled the matter"