From Longman Dictionary of Contemporary Englishstayerstay‧er /ˈsteɪə $ -ər/ noun [countable] British EnglishDSHDSSTRONG PERSON a horse or person that is able to continue to the end of a long race, job etc
Examples from the Corpus
stayer• Top class stayer, especially effective over the more stamina-testing trips.• But Cool Ground is a dour stayer with a wealth of experience, who should adapt to Aintree.• It was also in this period that the frequent stayer programmes were introduced.• Kilmacar Dilemma-Already making a name for herself but a lot more is expected by those close to this talented stayer. 