Exocentric
mainstream is exocentric
endocentric
It is an endocentric compound ;) It's a kind of yard where there are graves
In an endocentric compound, one element is the head that determines the category of the compound, while the other element specifies the meaning more precisely (e.g., 'blackbird,' where 'bird' is the head). In an exocentric compound, the meaning does not rely on one element to determine the category, and the compound's meaning must be derived from outside the compound (e.g., 'pickpocket,' where the compound does not fit strictly into the category of either 'pick' or 'pocket').
Cold water is an endocentric construction, since it functions as would the noun water. Greenhouse is an endocentric compound, since it is a noun as is its head house.
'A new era of media message' is not a complete sentence. But yes, it is an endocentric phrase, because it can serve as a noun.
An aftertaste is a taste remaining after the the substance causing it is no longer in the mouth.
Aftertaste we had some cake for dessert In my opinion, a better sentence would be: After eating cake for dessert, we all had a wonderful aftertaste in our mouths.
Flavor
tree
The cast of The AfterTaste of the AfterLife - 2008 includes: Anton Benois as Lennon Betty Koras as Linda