life vs period

life and period both are nouns.

Word	Noun	Adjective	Verb	Adverb
life	Yes	No	No	No
period	Yes	No	No	No

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

life: the period during which something is functional (as between birth and death)
period: an amount of time

Other hypernyms of life include period of time, time period.

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

Other hypernyms of life include period of time, time period.

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

Other hypernyms of life include period of time, time period.

life (noun)	period (noun)
living things collectively	a punctuation mark (.) placed at the end of a declarative sentence to indicate a full stop or after abbreviations
animation and energy in action or expression	the monthly discharge of blood from the uterus of nonpregnant women from puberty to menopause
the experience of being alive; the course of human events and activities	an amount of time
an account of the series of events making up a person's life	the interval taken to complete one cycle of a regularly repeating phenomenon
a motive for living	a unit of geological time during which a system of rocks formed
a living person	the end or completion of something
the organic phenomenon that distinguishes living organisms from nonliving ones	(ice hockey) one of three divisions into which play is divided in hockey games
the condition of living or the state of being alive
a characteristic state or mode of living
the course of existence of an individual; the actions and events that occur in living
the period during which something is functional (as between birth and death)
the period between birth and the present time
the period from the present until death
a prison term lasting as long as the prisoner lives