No. It is a proper noun. However, arabic is acceptable.
Its Ankaboot
Shams is the Arab word for sun. This word has roots that go back to the time of the writing of the Epic of Gilgamesh, which references the Akkadian deity called Shamash.
Jihad
assassin
berber, mongol, or European This question doesn't specify in what way something would follow Arab. In the dictionary, the first word after Arab is typically "arabesque".
No. Eariest is not an acceptable Scrabble word.
No. Wop is not an acceptable Scrabble word.
No. Fo is not an acceptable Scrabble word.
Yes. Moot is an acceptable Scrabble word.
Yes, "nus" is an acceptable word in Scrabble.
No. Excelsis is not an acceptable Scrabble word.
Abbreviations are not acceptable in Scrabble.
No. Viz is not an acceptable Scrabble word.
No. Cie is not an acceptable Scrabble word.
In my eyes yes RN is an acceptable scrabble word.
Yes. Jo is an acceptable Scrabble word.
Yes. Re is an acceptable Scrabble word.