As nouns the difference between intercession and interceding
is that intercession
is the act of intervening or mediating between two parties while interceding
is an intercession.
As a verb interceding is
Other Comparisons: What's the difference?
* intercessation of saints
* 1851 , Herman Melville, Moby-Dick
- Oh, high aspiring, rainbowed jet!—that one strivest, this one jettest all in vain! In vain, oh whale, dost thou seek intercedings with yon all-quickening sun