say it: STAY-ur
stayer is a noun meaning "a person or other animal having powers of endurance or perseverance". It carries one recorded sense.
a person or other animal having powers of endurance or perseverance
“the horse that won the race is a good stayer”
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for stayer come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.