The Oxford Thesaurus An A-Z Dictionary of Synonyms INTRO ...

sorry to have been so much trouble to you.
profundity
n. 1 depth, profoundness, abstruseness, reconditeness,
arcaneness, intricacy, subtlety, complexity, complicatedness,
difficulty, inscrutability, involvement, involvedness;
indecipherability, incomprehensibility, incomprehensibleness,
obscurity: I wouldn't claim to have fully grasped the
profundity of his ideas. 2 erudition, discernment, scholarship,
scholarliness, sagacity, wisdom, sharpness, keenness,
astuteness, acumen, insightfulness, knowledgeableness,
knowledgeability: I was amazed by the profundity of the
argument of one so young.
profuse adj. 1 abundant, ample, plentiful, copious, unstinting,
unsparing, ungrudging: My profuse apologies if I have offended
you in any way. 2 extravagant, lavish, bountiful, bounteous,
prolific, luxuriant, abundant, exuberant, superabundant, lush,
thick, teeming, overflowing, bursting, thriving, productive,
fruitful, rich: From the seventh year onwards, the trees
yielded profuse crops of pears and plums. 3 excessive, copious,
considerable, prolific, liberal, lavish, free, abundant, ample:
This stage of the fever is accompanied by profuse sweating. 4
generous, abundant, plentiful, copious, unsparing, unselfish,
unstinting, exuberant, magnanimous, liberal: The audience was
profuse in its applause and cries of 'Bravo!' and 'Encore!'
profusion n. profuseness, quantity, abundance, plenty, plentifulness,
plenteousness, bounty, copiousness, superabundance; mass, host,
hoard, number, multitude, lot, mountain, load, mess, stack,
pile, heap, agglomeration, conglomeration, accumulation, wealth,
glut, surplus, oversupply, surfeit, plethora, superfluity,
Formal nimiety: Ivy grew in profusion over the front of the
house. We had never seen such a profusion of bric-…-brac as they
had collected.
progenitor
n. 1 progenitrix, ancestor, forefather, forebear: They
regarded the snake god as the progenitor of the human race. 2
predecessor, forerunner, precursor, antecedent, foregoer,
source, originator; origin, original, prototype, archetype,
pattern, guide: The ancient philosophers were progenitors of
many modern ideas. Some regard da Vinci's designs as the