Usage: 4 forms in 8 verses
Form Translated As     In Verse(s)
σχίζασ darts LXX.1Sam.20.36LXX.1Sam.20.38LXX.1Sam.20.38
σχίζαν dart LXX.1Sam.20.21
σχίζαισ darts LXX.1Sam.20.20
σχίζα dart LXX.1Sam.20.21LXX.1Sam.20.22LXX.1Sam.20.37

Liddell-Scott-Jones

σχίζα (schiza) a dart G:N-F

σχίζα-α, ης, ,

(σχίζαω) piece of wood cut off, lath, splinter, σχίζα δρυός [Refs 8th c.BC+]: plural, wood cleft small, especially firewood, καῖε δ᾽ ἐπὶ σχίζαῃς [τοὺς μηρούς] [σχίζαῃσιν ἀφύλλοισιν κατέκαιον 8th c.BC: Ilias Homerus Epicus “Illiad” 2.425. ">Refs 8th c.BC+]

__2 shaft, dart, [σχίζααι εἰς βέλη καταπαλτῶν “IG” 22.1629.996. ">LXX]

LSJ Scripture Refs: LXX.1Kgs.20.20*