1) Alter 2) Change 3) Islamise 4) Modify 5) To convert to Islam 1) Islamise 
• (v. i. & t.) To conform, or cause to conform, to the religion of Islam.
Is'lam·ize intransitive verb & t. [ imperfect & past participle Islamized ; present participle & verbal noun Islamizing .] To conform, or cause to conform, to the religion of Islam. 
Islamise verb convert to Islam; `The Mughals Islamized much of Northern India in the 16th century`
to convert to Islam. · to bring into a state of harmony or conformity with the principles and teachings of Islam; give an Islamic character or identity to.