1: ὄρος
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(Strong's #3735 — Noun Neuter — oros — or'-os )

"a hill or mountain," is translated "hill" in Matthew 5:14; Luke 4:29; "mountain" in Luke 9:37 , RV, AV, "hill" (of the mount of transfiguration) as in Luke 9:28 . See MOUNTAIN.

2: ὀρεινός
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(Strong's #3714 — Adjective — oreinos — or-i-nos' )

an adjective meaning "mountainous, hilly," is used in the feminine, oreine, as a noun, and rendered "hill country" in Luke 1:39,65 . See COUNTRY.

3: βουνός
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(Strong's #1015 — Noun Masculine — bounos — boo-nos' )

"a mound, heap, height," is translated "hill" in Luke 3:5; "hills" in Luke 23:30 .

Acts 17:22