Roy Moore, the former Senate candidate from Alabama who has been accused of pursuing sexual and romantic relationships with teenagers, sued four of his accusers on Monday, alleging that they had defamed and conspired against him.

In a lawsuit filed in the Circuit Court of Etowah County, Ala., where Mr. Moore lives, he accused the women — Leigh Corfman, Debbie Gibson, Tina Johnson and Beverly Nelson — of committing libel and slander “by making statements which were false, malicious, and made with intentional or reckless disregard of the truth and with the intent that those statements be published to others, including through state and national media.”

“Those statements caused harm to the reputation and character of Judge Moore and also to his wife Kayla, lowered their standing in the community and discouraged members of the community from associating with them,” the lawsuit said.

Mr. Moore is seeking compensatory damages for lost income and professional opportunities, as well as punitive damages.