What is the difference between the word Isti'aadhah and Ta'awwudh?

Question
What is the difference between the word Isti'aadhah and Ta'awwudh?
JazaakumullahuKhayran

Answer
There is no difference, they are two derivatives of the same root when means to seek refuge, one is a noun and the other a verb.  Either is fine.
Wa iyyaakum