yarn vs dental floss

yarn and dental floss both are nouns.

Word	Noun	Adjective	Verb	Adverb
yarn	Yes	No	Yes	No
dental floss	Yes	No	No	No

As nouns, dental floss is a hyponym of yarn; that is, dental floss is a word with a more specific, narrower meaning than yarn:

yarn: a fine cord of twisted fibers (of cotton or silk or wool or nylon etc.) used in sewing and weaving
dental floss: a soft thread for cleaning the spaces between the teeth

yarn (noun)	dental floss (noun)
a fine cord of twisted fibers (of cotton or silk or wool or nylon etc.) used in sewing and weaving	a soft thread for cleaning the spaces between the teeth
the act of giving an account describing incidents or a course of events

yarn (verb)	dental floss (verb)
tell or spin a yarn