Sophia, abstruseness, abyss, acumen, ampleness, astuteness, bigness, bottomlessness, broad-mindedness, broadness, capaciousness, complexity, complication, comprehensiveness, copiousness, crabbedness, crampedness, deep-downness, deep-rootedness, deep-seatedness, deepness, depth, difficulty, discernment, erudition, esoterica, expansiveness, extensiveness, extreme innerness, fathomlessness, generousness, good understanding, grandeur, grandiosity, grandness, greatness, hardness, incomprehensibility, indecipherability, inscrutability, interiority, intricacy, involvement, keenness, knottiness, knowledgeability, largeness, mellow wisdom, obscurity, plumblessness, profoundness, reconditeness, ripe wisdom, sagacity, sageness, sapience, scholarliness, scholarship, seasoned understanding, sharpness, sound understanding, spaciousness, subterraneity, subtlety, tallness, wideness, wisdom, wiseness