The term 'chieftain arab' refers to a leader of an Arab tribe. The five crossword solutions for this term are EMEER (5 letters), EMIR (4 letters), AMIR (4 letters), AMEER (5 letters) and ROLLO (5 letters). EMEER, EMIR and AMIR are all variations of the same word, which is derived from the Arabic word 'amir', meaning commander or prince. AMEER is another variation of the same word, while ROLLO is a variant of the French word 'roi', meaning king. All of these words refer to a leader of an Arab tribe, and can be used interchangeably.