There are no Scrabble words, but you can make the word Oz.
Four letter words ending in z include:quizritz
Four letter word beginning with Z and ending with T:Zest
topaz
6-letter words ending in Z include: kibitz ersatz pizazz
Lots!BuzzChezDitzFizzFrizFutzFuzzGeezJazzJeezLutzOyezPhizPrezPutzQuizRazzRitzSpazWhizYutz
Glitz.
Nazi
Ersatz.
weezfizz, and jeez!
They are ZITI and ZUNI.
azure
jazz