Adjectives

(s)aged, elderly, older, senioradvanced in years; (`aged' is pronounced as two syllables)“aged members of the society”, “elderly residents could remember the construction of the first skyscraper”, “senior citizen”
(s)elder, older, sr.used of the older of two persons of the same name especially used to distinguish a father from his son“Bill Adams, Sr.”
(s)old, olderskilled through long experience“an old offender”, “the older soldiers”