snatcher vs shanghaier

snatcher and shanghaier both are nouns.

Word	Noun	Adjective	Verb	Adverb
snatcher	Yes	No	No	No
shanghaier	Yes	No	No	No

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

snatcher: someone who unlawfully seizes and detains a victim (usually for ransom)
shanghaier: a kidnapper who drugs men and takes them for compulsory service aboard a ship

Other hyponyms of snatcher include crimp, crimper, seizer.

snatcher (noun)	shanghaier (noun)
someone who unlawfully seizes and detains a victim (usually for ransom)	a kidnapper who drugs men and takes them for compulsory service aboard a ship
a thief who grabs and runs