argot vs non-standard speech

argot and non-standard speech both are nouns.

Word	Noun	Adjective	Verb	Adverb
argot	Yes	No	No	No
non-standard speech	Yes	No	No	No

As nouns, non-standard speech is a hypernym of argot; that is, non-standard speech is a word with a broader meaning than argot:

argot: a characteristic language of a particular group (as among thieves)
non-standard speech: speech that differs from the usual accepted, easily recognizable speech of native adult members of a speech community

argot (noun)	non-standard speech (noun)
a characteristic language of a particular group (as among thieves)	speech that differs from the usual accepted, easily recognizable speech of native adult members of a speech community