As verbs the difference between crumbing and crumbling
is that crumbing is present participle of crumb while crumbling is present participle of lang=en.
As a noun crumbling is
material that has crumbled away; crumbs.
crumbling
English
Verb
(head)
Noun
(
en noun)
Material that has crumbled away; crumbs.
* Henry James, The Aspern Papers
- Blank I call it, but it was figured over with the patches that please a painter, repaired breaches, crumblings of plaster, extrusions of brick that had turned pink with time