slum vs shantytown

slum and shantytown both are nouns.

Word	Noun	Adjective	Verb	Adverb
slum	Yes	No	Yes	No
shantytown	Yes	No	No	No

As nouns, shantytown is a hyponym of slum; that is, shantytown is a word with a more specific, narrower meaning than slum:

Other hyponyms of slum include skid row.

slum (noun)	shantytown (noun)
a district of a city marked by poverty and inferior living conditions	a city district inhabited by people living in huts and shanties

slum (verb)	shantytown (verb)
spend time at a lower socio-economic level than one's own, motivated by curiosity or desire for adventure; usage considered condescending and insensitive