Noah Webster's Dictionary (n.) One who slanders; a defamer; a calumniator.

Multi-Version Concordance Slanderer (5 Occurrences) Leviticus 19:16 "'You shall not go up and down as a slanderer among your people. "'You shall not endanger the life of your neighbor. I am Yahweh. (WEB NAS RSV) Psalms 140:11 An evil speaker shall not be established in the earth: Evil shall hunt the violent man to overthrow him. (See JPS NAS RSV NIV) Proverbs 16:28 A man of twisted purposes is a cause of fighting everywhere: and he who says evil secretly makes trouble between friends. (See NAS) Proverbs 20:19 He who goes about talking of the business of others gives away secrets: so have nothing to do with him whose lips are open wide. (See NAS) Jeremiah 9:4 Take ye heed every one of his neighbour, and trust ye not in any brother; for every brother acteth subtly, and every neighbour goeth about with slanders. (See NAS RSV NIV)