words vs fuss

words and fuss both are nouns.

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

As nouns, fuss is a hyponym of words; that is, fuss is a word with a more specific, narrower meaning than words:

Other hyponyms of words include affray, altercation, fracas, bicker, bickering, pettifoggery, spat, squabble, tiff, bust-up.

words (noun)	fuss (noun)
words making up the dialogue of a play	a rapid active commotion
an angry dispute	a quarrel about petty points
the text of a popular song or musical-comedy number	an angry disturbance
the words that are spoken	an excited state of agitation
language that is spoken or written

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