Crossword Puzzle Words before Z

Clue: Words before Z

Source of the words "zenith" and "nadir" (ARABIC with 6 letters)
Talk show about words like "zeppelin" and "dirigible"? (THEFLYINGNOUN with 13 letters)
"___ you one" (obligee's words) (IOWE with 4 letters)
Words to an old chap (e.g. IDARESAY with 8 letters)
Doctor of words (PETERROGET with 10 letters)
Zaire now (CONGO with 5 letters)
Words before guard or time (BEON with 4 letters)
Words written on a pacifier? (DUMMYTEXT with 9 letters)
Refrain words (TRALA with 5 letters)
Drove 90 in a 75 zone (SPED with 4 letters)