As nouns the difference between fumbler and humbler
is that fumbler is agent noun of fumble; one who fumbles while humbler is one who humbles.
As an adjective humbler is
(humble).
humbler
English
Noun
(
en noun)
One who humbles.
* Sydney Smith
- the unravellers of cunning, the investigators of artifice, the humblers of pride, and the scourgers of oppression
(BDSM) A physical restraint that clamps around the base of the scrotum and prevents straightening of the legs.