The word eagle is sometimes used like an adjective, for example, he has an eagle eye. But this is more properly a noun adjunct, although eagle-eyed is an adjective.
A good adjective for a bald eagle is swift, deadly, fast, intimidating, patient,.......
swooping
No, it is not a preposition. An eagle is a bird, a noun, which may be used as an adjunct or adjective (eagle nest, eagle feather).
The adjective form of concept is conceptual.The adjective form of conception is conceptional.
The adjective form for the pronoun they is their.
The adjective form of concept is conceptual.The adjective form of conception is conceptional.
The Adjective form of Pathologist is Pathological.
The adjective form of improve is "improved."
The adjective form is decisive.
The adjective form is cranial.
The adjective form is comedic.
The adjective form is kingly.