history vs life story

history and life story both are nouns.

Word	Noun	Adjective	Verb	Adverb
history	Yes	No	No	No
life story	Yes	No	No	No

As nouns, life story is a hyponym of history; that is, life story is a word with a more specific, narrower meaning than history:

history (noun)	life story (noun)
the discipline that records and interprets past events involving human beings	an account of the series of events making up a person's life
all that is remembered of the past as preserved in writing; a body of knowledge
a record or narrative description of past events
the aggregate of past events
the continuum of events occurring in succession leading from the past to the present and even into the future