Orthodox Jew vs Chassid

Orthodox Jew and Chassid both are nouns.

Word	Noun	Adjective	Verb	Adverb
Orthodox Jew	Yes	No	No	No
Chassid	Yes	No	No	No

As nouns, Chassid is a hyponym of Orthodox Jew; that is, Chassid is a word with a more specific, narrower meaning than Orthodox Jew:

Orthodox Jew: Jew who practices strict observance of Mosaic law
Chassid: a member of a Jewish sect that observes a form of strict Orthodox Judaism

Other hyponyms of Orthodox Jew include Chasid, Hasid, Hassid, Lubavitcher.

Orthodox Jew (noun)	Chassid (noun)
Jew who practices strict observance of Mosaic law	a member of a Jewish sect that observes a form of strict Orthodox Judaism