life-style vs modus vivendi

life-style and modus vivendi both are nouns.

Word	Noun	Adjective	Verb	Adverb
life-style	Yes	No	No	No
modus vivendi	Yes	No	No	No

As nouns, life-style and modus vivendi are synonyms defined as:

life-style and modus vivendi: a manner of living that reflects the person's values and attitudes

Other synonyms of life-style include life style, lifestyle.

life-style (noun)	modus vivendi (noun)
a manner of living that reflects the person's values and attitudes	a manner of living that reflects the person's values and attitudes
	a temporary accommodation of a disagreement between parties pending a permanent settlement