The word(s) "martyrdom" appears 2 time(s) in 2 verse(s) in Quran in Mohsin Khan translation.

(1) You did indeed wish for death (Ash-Shahadah - martyrdom) before you met it. Now you have seen it openly with your own eyes.

(سورة آل عمران, Aal-i-Imraan, Chapter #3, Verse #143)
(Arabic, Transliteration, Urdu (Ahmed Ali), Urdu (Jalandhry), Farsi, Yusuf Ali, Shakir, Picthal, Mohsin Khan, French, Spanish, Indonesian, Malay, German, Bosnian, Russian, Dutch, Italian, Portuguese, Tafsir - Jalal ad-Din, Tafsir - King Fahad Quran Complex)

(2) Say: "Do you wait for us (anything) except one of the two best things (martyrdom or victory); while we await for you either that Allah will afflict you with a punishment from Himself or at our hands. So wait, we too are waiting with you."

(سورة التوبة, At-Tawba, Chapter #9, Verse #52)
(Arabic, Transliteration, Urdu (Ahmed Ali), Urdu (Jalandhry), Farsi, Yusuf Ali, Shakir, Picthal, Mohsin Khan, French, Spanish, Indonesian, Malay, German, Bosnian, Russian, Dutch, Italian, Portuguese, Tafsir - Jalal ad-Din, Tafsir - King Fahad Quran Complex)