The plural form for the noun printer is printers.
The plural possessive form is printers'.
examples:
The printers' union provides benefits for their members.
Check all of the printers' paper supplies before leaving for the day.
The possessive form of the plural noun proofs is proofs'.Example: I'm waiting for the proofs' delivery from the printer.
The plural form of printer is printers.
The possessive form for the plural noun wives is wives'.
The plural possessive noun of molecules is molecules' .
The plural form for the noun buzz is buzzes; the plural possessive form is buzzes'.
The plural possessive noun for "vowel" is "vowels'".
The word sisters is the plural form; the plural possessive is sisters'.
The plural form for the noun tree is trees.The plural possessive form is trees'.
The noun "branch" is a regular plural noun, a noun that forms its plural by adding "s" or "es". The plural form of branch is "branches".The plural possessive form is branches', a regular plural possessive.
pLURAL ; orbits Possessive plural ; Orbits' (NB note the position of the apostrophe).
The plural possessive noun is racers'.
The plural possessive form for the noun senators is senators'.