Yes, the word pianists is the plural form; the word pianists' is the plural possessive form. Example:
The pianists' rehearsal is scheduled for Wednesday.
Pianists is plural The possessive is painists'
The plural form for the noun composer is composers; the plural possessive is composers'.
The possessive form of the plural noun sopranos is sopranos'.Example: The sopranos' rehearsal is scheduled for two.
The possessive form of the plural noun musicians is musicians'.example: The musicians' rehearsal is scheduled for eight.
The plural form of the noun singer is singers.The plural possessive form is singers'.example: The singers' voices filled the auditorium.
Pianists is plural The possessive is painists'
The possessive form for the plural noun wives is wives'.
The plural possessive form of the noun "buzz" is "buzzes'".
The plural possessive noun of molecules is molecules' .
The noun skies is the plural form of the noun sky.The possessive forms are:sky's (singular possessive)skies' (plural possessive)
The plural possessive noun for "sisters" is "sisters'".
The plural form for the noun tree is trees.The plural possessive form is trees'.
The plural possessive noun is racers'.
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.
The plural possessive form of "senators" is "senators'."
The plural form for the noun leader is leaders. The plural possessive form is leaders'.
The plural possessive form of "university" is "universities'."