Answer: lifespan

AnswerCrossword Clue
LIFESPANDuration
LIFESPANLongevity
LIFESPAN100 years or more, for a giant tortoise
LIFESPANMortal measure
LIFESPANAbout a month, for a fruit fly
LIFESPANBirth to death
lifespanthe time from birth to death