From English - German Ding/FreeDict dictionary ver. 1.9-fd1:
old-age pensioner /ˈəʊld ˈeɪdʒ pˈɛnʃənə/ (OAP /ˈəʊp/)
[Br.] [becoming dated] Rentner <masc> [Dt.] [Schw.] , Pensionär <masc> [Dt.] [Schw.] , Pensionist <masc> [Bayr.] [Ös.] , Pensionierter <masc> [Schw.] , Ruheständler <masc> [ugs.]
"old-age pensioners" - Rentner, Pensionäre, Pensionisten, Pensionierte, Ruheständler
Synonyms: pensioner, pensionary, retiree
see: pensioners, pensionaries, retirees, retired people, early pensioner