lifestyle vs fast lane

lifestyle and fast lane both are nouns.

Word	Noun	Adjective	Verb	Adverb
lifestyle	Yes	No	No	No
fast lane	Yes	No	No	No

As nouns, fast lane is a hyponym of lifestyle; that is, fast lane is a word with a more specific, narrower meaning than lifestyle:

lifestyle: a manner of living that reflects the person's values and attitudes
fast lane: a hectic and pressured lifestyle often characterized by recklessness or dissipation

Other hyponyms of lifestyle include free living, vanity fair, nomadism, settledness.

lifestyle (noun)	fast lane (noun)
a manner of living that reflects the person's values and attitudes	the traffic lane for vehicles that are moving rapidly
	a hectic and pressured lifestyle often characterized by recklessness or dissipation