Agespan

1 clue
Methuselah's 969
Similar answers:
Aaverage
Aaverages
Abeverage
Aboverage
Abovetheaverage
Acage
Acamouflagesuit
Acceptedusage
Acebandage
Acebandages
Acreage
Acreages
Acrushofteenagers
Actingoutage
Actonesage
Actsonesage
Actyourage
Acutebandages
Adage
Adagencies