1.  whoremonger(n = noun.person) john, trick, whoremaster - a prostitute's customer;
is a kind of client, customer

2.  whoremonger(n = noun.person) whoremaster - a pimp who procures whores;
is a kind of fancy man, pandar, pander, panderer, pimp, ponce, procurer

   A whoremaster; a lecher; a man who frequents the society of whores. [1913 Webster]

whoremonger, n. archaic a person who has dealings with whores.

N  libertine, voluptuary, rake, debauchee, loose fish, rip, rakehell, fast man, intrigant, gallant, seducer, fornicator, lecher, satyr, goat, whoremonger, paillard, adulterer, gay deceiver, Lothario, Don Juan, Bluebeard, chartered libertine, adulteress, advoutress, courtesan, prostitute, strumpet, harlot, whore, punk, fille de joie, woman, woman of the town, streetwalker, Cyprian, miss, piece, frail sisterhood, demirep, wench, trollop, trull, baggage, hussy, drab, bitch, jade, skit, rig, quean, mopsy, slut, minx, harridan, unfortunate, unfortunate female, unfortunate woman, woman of easy virtue, wanton, fornicatress, Jezebel, Messalina, Delilah, Thais, Phryne, Aspasia, Lais, lorette, cocotte, petite dame, grisette, demimonde, chippy, sapphist, spiritual wife, white slave, concubine, mistress, doxy, chere amie, bona roba, pimp, procurer, pander, pandar, bawd, conciliatrix, procuress, mackerel, wittol.