old man vs jargon

old man and jargon both are nouns.

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

old man (noun)	jargon (noun)
an informal term for your father	a characteristic language of a particular group (as among thieves)
a man who is very old	specialized technical terminology characteristic of a particular subject
a familiar term of address for a man	a colorless (or pale yellow or smoky) variety of zircon
(slang) boss
aromatic herb of temperate Eurasia and North Africa having a bitter taste used in making the liqueur absinthe