Source : Webster's Revised Unabridged Dictionary (1913)

Profoundness \Pro*found"ness\, n.
   The quality or state of being profound; profundity; depth.
   --Hooker.

Source : WordNet®

profoundness
     n 1: wisdom that is recondite and abstruse and profound; "the
          anthropologist was impressed by the reconditeness of the
          native proverbs" [syn: {reconditeness}, {abstruseness},
          {abstrusity}, {profundity}]
     2: the intellectual ability to penetrate deeply into ideas
        [syn: {astuteness}, {profundity}, {depth}]
     3: the quality of being physically deep; "the profundity of the
        mine was almost a mile" [syn: {deepness}, {profundity}]
        [ant: {shallowness}]
     4: intellectual depth; penetrating knowledge; keen insight;
        etc; "the depth of my feeling"; "the profoundness of the
        silence" [syn: {profundity}] [ant: {superficiality}]