jargon vs old man

jargon and old man both are nouns.

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

jargon (noun)	old man (noun)
a characteristic language of a particular group (as among thieves)	an informal term for your father
specialized technical terminology characteristic of a particular subject	a man who is very old
a colorless (or pale yellow or smoky) variety of zircon	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