century vs quattrocento

century and quattrocento both are nouns.

Word	Noun	Adjective	Verb	Adverb
century	Yes	No	No	No
quattrocento	Yes	No	No	No

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

Other hyponyms of century include twentieth century.

century (noun)	quattrocento (noun)
ten 10s	the 15th century in Italian art and literature
a period of 100 years