Open English Wordnet
Nouns
(n)reconditeness, abstruseness, abstrusity, profoundness, profunditywisdom that is recondite and abstruse and profound“the anthropologist was impressed by the reconditeness of the native proverbs”
(n)profundity, profoundnessintellectual depth, penetrating knowledge, keen insight, etc.“the depth of my feeling”, “the profoundness of the silence”
(n)astuteness, profundity, profoundness, depth, deepnessthe intellectual ability to penetrate deeply into ideas
(n)deepness, profundity, profoundnessthe quality of being physically deep“the profundity of the mine was almost a mile”