nomad vs Bedouin

nomad and Bedouin both are nouns.

Word	Noun	Adjective	Verb	Adverb
nomad	Yes	No	No	No
Bedouin	Yes	No	No	No

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

nomad: a member of a people who have no permanent home but move about according to the seasons
Bedouin: a member of a nomadic tribe of Arabs

Other hyponyms of nomad include Beduin, Bushman, Khoisan, Hun, Saracen, Scythian.

nomad (noun)	Bedouin (noun)
a member of a people who have no permanent home but move about according to the seasons	a member of a nomadic tribe of Arabs