This root form (lemma) is used in 2 different forms in the NT: λοίδοροι (NMP), λοίδορος (NMS).
It is glossed in 2 different ways: ‘an insulter’, ‘insulters’.
OET 1COR 5:11 Greek word=λοίδορος (loidoros) Morphology=NMS English gloss=‘an insulter’ SR GNT 1COR 5:11 word 20
OET 1COR 6:10 Greek word=λοίδοροι (loidoroi) Morphology=NMP English gloss=‘insulters’ SR GNT 1COR 6:10 word 14