i Register
In some senses, grandeur is marked as archaic, rare. Watch for register when choosing this word.
noun
The state of being grand or splendid; magnificence.
I wrapp’d myself in grandeur then, And donn’d a visionary crown ——
So much of what followed from the drawing boards of others will have been designed with the demands, effort and grandeur of Primrose Hill [tunnel] in the back of their minds.
Nobility (state of being noble).
Greatness; largeness; tallness; loftiness.