dysphemism vs old man

dysphemism and old man both are nouns.

Word	Noun	Adjective	Verb	Adverb
dysphemism	Yes	No	No	No
old man	Yes	No	No	No

As nouns, old man is a hyponym of dysphemism; that is, old man is a word with a more specific, narrower meaning than dysphemism:

dysphemism: an offensive or disparaging expression that is substituted for an inoffensive one
old man: an informal term for your father

Other hyponyms of dysphemism include bus, heap, jalopy.

dysphemism (noun)	old man (noun)
an offensive or disparaging expression that is substituted for an inoffensive one	an informal term for your father
	a man who is very old
	a familiar term of address for a man
	(slang) boss
	aromatic herb of temperate Eurasia and North Africa having a bitter taste used in making the liqueur absinthe