What's the difference between grumbler and rumbler?
Grumbler
Definition:
(n.) One who grumbles.
Example Sentences:
(1) Young people should ignore the cynics and the grumblers.
(2) Immigration might rankle armchair grumblers, but housing will bring voters out fighting in 2015.
(3) And rather the fact-based miseries of these poor bastards than the fictional boohooisms of fellow "It were shite back then" costume grumbler The Village.
(4) Thus the future is assured; and with her consolidated grip on power she should be able to silence the grumblers at this weekend’s party conference in Birmingham.