恐い (こわい) Scary, Frightening, Eerie, Dreadful, I'm Afraid, I'm Scared
恐ろしい (おそろしい) Terrifying, Frightening, Dreadful
恐れる (おそれる) To Fear, To Dread
恐れ (おそれ) Fear, Horror, Anxiety, Concern, Uneasiness, Dread
恐らく (おそらく) Probably, Perhaps, Likely, I Dare Say, Maybe, As Likely As Not