Mohammad Javad Zarif, foreign Minister of Iran, had a talk with Charlie Rose months after JCPOA (commonly known as Iran nuclear deal) disccussing the agreement and other related issues. In this talk, Zarif refers to the agreement as:
It was a deal not a treaty.
Consulting various dictionaries, no clear difference can be found between the two words. I would appreciate it if you could clarify this for me.
The link to the talk is provided below: