rhyming slang vs argot

rhyming slang and argot both are nouns.

Word	Noun	Adjective	Verb	Adverb
rhyming slang	Yes	No	No	No
argot	Yes	No	No	No

As nouns, argot is a hypernym of rhyming slang; that is, argot is a word with a broader meaning than rhyming slang:

rhyming slang: slang that replaces words with rhyming words or expressions and then typically omits the rhyming component
argot: a characteristic language of a particular group (as among thieves)

Other hypernyms of rhyming slang include cant, jargon, lingo, patois, slang, vernacular.

rhyming slang (noun)	argot (noun)
slang that replaces words with rhyming words or expressions and then typically omits the rhyming component	a characteristic language of a particular group (as among thieves)