1.  indecency(n = noun.attribute) - the quality of being indecent;
is a kind of improperness, impropriety
has particulars: immodesty, enormity, outrageousness, bawdiness, lewdness, obscenity, salaciousness, salacity
Antonym: decency
Derived forms adjective indecent₂, adjective indecent₃, adjective indecent₁

2.  indecency(n = noun.act) impropriety - an indecent or improper act;
is a kind of misbehavior, misbehaviour, misdeed
has particulars: obscenity
Derived forms adjective indecent₂, adjective indecent₃, adjective indecent₁

1.  The quality or state of being indecent; lack of decency, modesty, or good manners; obscenity. [1913 Webster]

2.  That which is indecent; an indecent word or act; an offense against delicacy. [1913 Webster]
"They who, by speech or writing, present to the ear or the eye of modesty any of the indecencies I allude to, are pests of society."

N  impurity, uncleanness, immodesty, grossness, indelicacy, indecency, impudicity, obscenity, ribaldry, Fescennine, smut, bawdry, double entente, equivoque, concupiscence, lust, carnality, flesh, salacity, pruriency, lechery, lasciviency, lubricity, Sadism, sapphism, incontinence, intrigue, faux pas, amour, amourette, gallantry, debauchery, libertinish, libertinage, fornication, liaison, wenching, venery, dissipation, seduction, defloration, defilement, abuse, violation, rape, incest, prostitution, social evil, harlotry, stupration, whoredom, concubinage, cuckoldom, adultery, advoutry, crim, con, free love, seraglio, harem, brothel, bagnio, stew, bawdyhouse, cat house, lupanar, house of ill fame, bordel, bordello, impure, unclean, not to be mentioned to ears polite, immodest, shameless, indecorous, indelicate, indecent, Fescennine, loose, risque, coarse, gross, broad, free, equivocal, smutty, fulsome, ribald, obscene, bawdy, pornographic, concupiscent, prurient, lickerish, rampant, lustful, carnal, carnal-minded, lewd, lascivious, lecherous, libidinous, erotic, ruttish, salacious, Paphian, voluptuous, goatish, must, musty, unchaste, light, wanton, licentious, debauched, dissolute, of loose character, of easy virtue, frail, gay, riggish, incontinent, meretricious, rakish, gallant, dissipated, no better than she should be, on the town, on the streets, on the pave, on the loose, adulterous, incestuous, bestial.