cigar vs corona

cigar and corona both are nouns.

Word	Noun	Adjective	Verb	Adverb
cigar	Yes	No	No	No
corona	Yes	No	No	No

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

Other hyponyms of cigar include cheroot, cigarillo, claro, panatela, panetela, panetella, stogie, stogy.

cigar (noun)	corona (noun)
a roll of tobacco for smoking	a long cigar with blunt ends
	(anatomy) any structure that resembles a crown in shape
	the outermost region of the sun's atmosphere; visible as a white halo during a solar eclipse
	an electrical discharge accompanied by ionization of surrounding atmosphere
	one or more circles of light seen around a luminous object
	(botany) the trumpet-shaped or cup-shaped outgrowth of the corolla of a daffodil or narcissus flower
	a viral disease caused by SARS-CoV-2 that caused a global pandemic in 2020