Yes
No. Qa is not a legal Scrabble word.
The only acceptable two letter word with Q is QI, a variation of the word Chi in "Taichi".
No. Fo is not an acceptable Scrabble word.
In my eyes yes RN is an acceptable scrabble word.
JO is an acceptable scrabble word. Searching the internet many sites have all the acceptable words for a game of scrabble and JO is repeated on 90% of these websites as being correct.
No. Qa is not a legal Scrabble word.
The only acceptable two letter word with Q is QI, a variation of the word Chi in "Taichi".
Abbreviations are not acceptable in Scrabble.
No. Excelsis is not an acceptable Scrabble word.
No. Cie is not an acceptable Scrabble word.
No. Viz is not an acceptable Scrabble word.
No. It is an acronym for 'Quality Assurance' or the like.
No. Wop is not an acceptable Scrabble word.
Yes. Jo is an acceptable Scrabble word.
No. Eariest is not an acceptable Scrabble word.
No. Fo is not an acceptable Scrabble word.
Yes, "nus" is an acceptable word in Scrabble.