atom vs chylomicron

atom and chylomicron both are nouns.

Word	Noun	Adjective	Verb	Adverb
atom	Yes	No	No	No
chylomicron	Yes	No	No	No

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

atom: (nontechnical usage) a tiny piece of anything
chylomicron: a microscopic particle of triglycerides produced in the intestines during digestion; in the bloodstream they release their fatty acids into the blood

Other hyponyms of atom include grain, grinding, flyspeck, identification particle.

atom (noun)	chylomicron (noun)
(physics and chemistry) the smallest component of an element having the chemical properties of the element	a microscopic particle of triglycerides produced in the intestines during digestion; in the bloodstream they release their fatty acids into the blood
(nontechnical usage) a tiny piece of anything