The main difference between Naan and Lavash is that the Naan is a Asian flatbread and Lavash is a flatbread.
Naan is a leavened, oven-baked flatbread found in the cuisines of the Middle East, Central Asia, and South Asia.
Lavash (Armenian: լավաշ; Turkish: lavaş; Kurdish: nanê loş; Persian: لواش; Georgian: ლავაში) is a soft, thin unleavened flatbread made in a tandoor and eaten all over the South Caucasus, Western Asia and the areas surrounding the Caspian Sea. Lavash is one of the most widespread types of bread in Armenia, Azerbaijan, Iran and Turkey.
In 2014, “lavash, the preparation, meaning and appearance of traditional bread as an expression of culture in Armenia” was inscribed in the UNESCO Representative List of the Intangible Cultural Heritage of Humanity. In 2016, making and sharing flatbread (lavash, katyrma, jupka or yufka) in communities of Azerbaijan, Iran, Kazakhstan, Kyrgyzstan and Turkey was inscribed on the list as well.