Everyone silenced to hear what momentous thing the man had to say.
In solos and duets, they appeared determined to do momentous things.
He had so many and such momentous things to do.
This was quite the most momentous thing that had occurred in the life of Manu.
You're about to see the most momentous thing in all modern science.
And he seemed to be talking really of momentous things, deep moralities.
We measure happiness and sadness by momentous things that happened on occasions such as these.
Sure, there were more momentous things to muse about.
A certain number of momentous things have to happen when the Ring changes hands.
The most momentous thing in human life is the art of winning the soul to good or to evil.