This root form (lemma) is used in 3 different forms in the NT: ἑλκῶν (GNP), ἕλκη (ANP), ἕλκος (NNS).
It is glossed in 2 different ways: ‘an ulcer’, ‘ulcers’.
OET LUKE 16:21 Greek word=ἕλκη (helkaʸ) Morphology=ANP English gloss=‘ulcers’ SR GNT LUKE 16:21 word 27
OET REV 16:2 Greek word=ἕλκος (helkos) Morphology=NNS English gloss=‘an ulcer’ SR GNT REV 16:2 word 16
OET REV 16:11 Greek word=ἑλκῶν (helkōn) Morphology=GNP English gloss=‘ulcers’ SR GNT REV 16:11 word 15