fuss vs ruckus

fuss and ruckus both are nouns.

Word	Noun	Adjective	Verb	Adverb
fuss	Yes	No	Yes	No
ruckus	Yes	No	No	No

As nouns, ruckus is a hypernym of fuss; that is, ruckus is a word with a broader meaning than fuss:

Other hypernyms of fuss include commotion, din, ruction, rumpus, tumult.

fuss (noun)	ruckus (noun)
a rapid active commotion	the act of making a noisy disturbance
a quarrel about petty points
an angry disturbance
an excited state of agitation

fuss (verb)	ruckus (verb)
worry unnecessarily or excessively
care for like a mother