This root form (lemma) is used in 2 different forms in the NT: ἐλεήμονες (NMP), ἐλεήμων (NMS).
It is glossed in 2 different ways: ‘a merciful’, ‘merciful’.
OET MAT 5:7 Greek word=ἐλεήμονες (eleaʸmones) Morphology=NMP English gloss=‘merciful’ SR GNT MAT 5:7 word 3
OET HEB 2:17 Greek word=ἐλεήμων (eleaʸmōn) Morphology=NMS English gloss=‘a merciful’ SR GNT HEB 2:17 word 9