Who smote
nakah  (naw-kaw')
to strike (lightly or severely, literally or figuratively)

---

great
rab  (rab)
abundant (in quantity, size, age, number, rank, quality)

---

nations
gowy  (go'-ee)
a foreign nation; hence, a Gentile; also (figuratively) a troop of animals, or a flight of locusts -- Gentile, heathen, nation, people.

---

and slew
harag  (haw-rag')
to smite with deadly intent -- destroy, out of hand, kill, murder(-er), put to (death), make (slaughter), slay(-er), surely.

---

mighty
`atsuwm  (aw-tsoom')
powerful (specifically, a paw); by implication, numerous -- + feeble, great, mighty, must, strong.

---

kings
melek  (meh'-lek)
a king -- king, royal.New American Standard Bible
He smote many nations And slew mighty kings,

King James Bible
Who smote great nations, and slew mighty kings;

Holman Christian Standard Bible
He struck down many nations and slaughtered mighty kings:

International Standard Version
He struck down many nations, killing many kings—

NET Bible
He defeated many nations, and killed mighty kings--

Aramaic Bible in Plain English
He who struck many peoples and killed Kings.

GOD'S WORD® Translation
He is the one who defeated many nations and killed mighty kings:

King James 2000 Bible
Who struck great nations, and slew mighty kings;Psalm 135:10
Psalm 135:10 NIV
Psalm 135:10 NLT
Psalm 135:10 ESV
Psalm 135:10 NASB
Psalm 135:10 KJV