Avenge là động từ; Revenge thường là danh từ

• Ta có People avenge something/ avenge themselves on somebody: She vowed to avenge her brother’s death. ◇ He later avenged himself on his wife’s killers
• take revenge on somebody: He swore to take (his) revenge on his political enemies.
• Ở văn phong trang trọng hơn hoặc trong văn chương, revenge có thể là động từ.
  People revenge themselves on somebody / are revenged on them: He was later revenged on his wife’s killers.
  Chúng ta không nói: revenge something: She vowed to revenge her brother’s death.