What's the noun for pensioners? Here's the word you're looking for.
pension
An annuity paid regularly as benefit due to a retired employee, serviceman etc. in consideration of past services, originally and chiefly by a government but also by various private pension schemes. [from 16th c.]
A boarding house or small hotel, especially in continental Europe, which typically offers lodging and certain meals and services. [from 17th c.]
“His parents, living off a retirement pension, needed him. The pull of family can be intense.”
“The other spouse is not disabled and therefore has the ability to earn a full income. Would the disabled person still have to split his or her disabled pension?”
“Salaried employees receive a monthly pension equal to 70% of the base salary, plus 2% of the salary for every year of contributions beyond 20 years.”
Someone who is at the age at which one typically receives a pension; an elderly person.
(obsolete, Britain, Cambridge University slang) A student who is not dependent on any foundation for support, but pays all university charges; at Oxford called a commoner.