nomadism vs life style

nomadism and life style both are nouns.

Word	Noun	Adjective	Verb	Adverb
nomadism	Yes	No	No	No
life style	Yes	No	No	No

As nouns, life style is a hypernym of nomadism; that is, life style is a word with a broader meaning than nomadism:

nomadism: The way of life of people who, having no fixed home, move around seasonally in search of food, water and grazing etc.
life style: a manner of living that reflects the person's values and attitudes

Other hypernyms of nomadism include life-style, lifestyle, modus vivendi.

nomadism (noun)	life style (noun)
The way of life of people who, having no fixed home, move around seasonally in search of food, water and grazing etc.	a manner of living that reflects the person's values and attitudes