age difference; disparity in age; age gap
age range; age-group; age bracket
(appropriate for) one's age
of the same age; age-matched
age of majority; age of adulthood
estimated (probable) age (e.g. of victim)
young (e.g. young children); of few years
age at marriage; age at which one marries
age (expressed in the Western style of counting fully completed years)
minimum age (e.g. employment)
age discrimination; agism
susceptible age (for a disease, condition, etc.); common age
productive age; working age
age of majority; age of adulthood