Yes, it's part of the standard US dictionary.
Yes. Fe is a legal Scrabble word.
No. Fo is not an acceptable Scrabble word.
In my eyes yes RN is an acceptable scrabble word.
Yes. Da is an acceptable Scrabble word.
Yes. Flub is an acceptable Scrabble word.
Yes. Fe is a legal Scrabble word.
No. Wop is not an acceptable Scrabble word.
No. Fo is not an acceptable Scrabble word.
No. Eariest is not an acceptable Scrabble word.
Yes, "nus" is an acceptable word in Scrabble.
Yes. Moot is an acceptable Scrabble word.
Abbreviations are not acceptable in Scrabble.
No. Cie is not an acceptable Scrabble word.
No. Excelsis is not an acceptable Scrabble word.
No. Viz is not an acceptable Scrabble word.
In my eyes yes RN is an acceptable scrabble word.
Yes, "fe" is a legal word in Scrabble. It is a two-letter word that is accepted in the official Scrabble dictionary.