slang vs old man

slang and old man both are nouns.

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

slang (noun)	old man (noun)
a characteristic language of a particular group (as among thieves)	an informal term for your father
informal language consisting of words and expressions that are not considered appropriate for formal occasions; often vituperative or vulgar	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