sandalwood and agarwood
These are two incense woods, with sandalwood all parts of the tree's wood is incense wood and has scent of some sort. But with agarwood only the infected area of the Aquilaria trees is incense wood with scent of some sort, this is caused by a resin the tree produces as a defense against the infection. This incense wood is called by many names aloeswood, agarwood, aloes wood, agar wood, eaglewood, and more. To avoid confusion between the plant “aloe” and the incense wood “aloeswood”, there is no correlation between the two. The original Chinese term is ( 沉水香 or 沉香, chen xiang ). You can include these Chinese words with the English terms to do a larger search on the subject. Below is a link to more info. http://teaarts.blogspot.com/2006/03/incense-lore.html