The word(s) "warner" appears 58 time(s) in 54 verse(s) in Quran in Mohsin Khan translation.

(41) Say (O Muhammad صلى الله عليه وسلم): "I am not a new thing among the Messengers (of Allah i.e. I am not the first Messenger) nor do I know what will be done with me or with you. I only follow that which is revealed to me, and I am but a plain warner."

(42) And remember (Hud) the brother of 'Ad, when he warned his people in Al-Ahqaf (the curved sand-hills in the southern part of Arabian Peninsula). And surely, there have passed away warners before him and after him (saying): "Worship none but Allah; truly, I fear for you the torment of a mighty Day (i.e. the Day of Resurrection)."

(43) And (remember) when We sent towards you (Muhammad صلى الله عليه وسلم) a group (three to ten persons) of the jinn, (quietly) listening to the Qur'an. When they stood in the presence thereof, they said: "Listen in silence!" And when it was finished, they returned to their people, as warners.

(44) Verily, We have sent you (O Muhammad صلى الله عليه وسلم) as a witness, as a bearer of glad tidings, and as a warner .

(45) Nay, they wonder that there has come to them a warner (Muhammad صلى الله عليه وسلم) from among themselves. So the disbelievers say: "This is a strange thing!

(46) So flee to Allah (from His Torment to His Mercy - Islamic Monotheism). Verily, I (Muhammad صلى الله عليه وسلم) am a plain warner to you from Him.

(47) And set not up (or worship not) any other ilah (god) along with Allah [Glorified be He (Alone), Exalted above all that they associate as partners with Him]. Verily, I (Muhammad صلى الله عليه وسلم) am a plain warner to you from Him.

(48) This (Muhammad صلى الله عليه وسلم) is a warner (Messenger) of the (series of) warners (Messengers) of old.

(49) Perfect wisdom (this Qur'an), but (the preaching of) warners benefit them not.

(50) It almost bursts up with fury. Every time a group is cast therein, its keeper will ask: "Did no warner come to you?"