Compare grump with other words:
crump vs. grump
grump vs. rump
glump vs. grump
grump vs. trump
frump vs. grump
grume vs. grump
grum vs. grump
grump vs. gump
grump vs. sulk
complaining vs. grump
grump vs. grumpy
grump vs. habitually
crabapple vs. grump
complain vs. grump