'morally imperative' is correct and can be used in written English.
It can be used to describe something that is required by a sense of morality or ethical standards. For example: In this situation, it is morally imperative that we respect the wishes of the people affected.
The percussive typography joins the verbal content to aggressive and somehow morally imperative effect.
"Abolishing slavery was morally imperative and necessary, and it's regrettable that it took the Civil War to do it.
It is morally imperative that the Obama administration and we as a society effectively address this situation.
To them, God was a "bigoted, vengeful white man," she writes in "The Butterfly Mosque," and atheism was "not just scientifically correct, it was morally imperative".
What is required, what is morally imperative, is imagination -- ironically, the very kind that Costello fears can be taken too far.
After his own imprisoned client died, Mr. Hughes recalled last week, "it seemed to me at that point ethically permissible and morally imperative that I spill the beans".
On the latter reading, for example, we can utter (5) truly even if we know that the coin is weighted, but we aren't sure in which way. (6) can express a moral imperative: you are obliged morally to eat a piece of cake.
As one speaker explained it, it's always been a morally-imperative thing to do to provide insurance to all Americans, but now, it's an economic necessity, as our lack of universal health care interferes with our ability to prosper as a nation.
Finally, there is a moral imperative to ensure that professional education embraces the morally complex, messy realities of patients' lives and socio-political contexts within which patients and practitioners interact [ 20, 26, 27].
"We should stand for universal health care, and more independents and Republicans are finally understanding that it's morally and economically imperative".
