pensioner

/pensioner/

Cases

SingularPluralWhen to use it
nominativepensionerthe pensionerpensionerlethe pensionersthe plain dictionary form — the doer of the sentence
genitivepensionernithe pensioner'spensionerlenithe pensioners'the owner — whose it is
accusativepensionernithe pensioner (as the object)pensionerlenithe pensioners (as the object)a specific, known object — whom or what
dativepensionergeto the pensionerpensionerlegeto the pensionersdirection or recipient — to where, to whom
locativepensionerdeat / in the pensionerpensionerledeat / in the pensionerswhere it is; also having — mende bar, "I have it"
ablativepensionerdenfrom the pensionerpensionerledenfrom the pensionerswhere it comes from; also "than" when comparing
When to use each case
nominative
the plain dictionary form — the doer of the sentence
genitive
the owner — whose it is
accusative
a specific, known object — whom or what
dative
direction or recipient — to where, to whom
locative
where it is; also having — mende bar, "I have it"
ablative
where it comes from; also "than" when comparing

The endings are the same ones the pronouns wear — that page explains when each case is used.

With an owner

One ownedSeveral owned
mypensionerimmy pensionerpensionerlerimmy pensioners
yourpensioneringyour pensionerpensionerleringyour pensioners
his / herpensionerihis / her pensionerpensionerlerihis / her pensioners
ourpensioneribizour pensionerpensionerleribizour pensioners
you all'spensionerigizyou all's pensionerpensionerlerigizyou all's pensioners
theirpensionerleritheir pensionerpensionerleritheir pensioners

The overlap in the last rows is real, not a mistake: pensionerleri can mean "his / her pensioners", "their pensioner", or "their pensioners" — context decides.