The singular possessive form of song is song's. The plural possessive is songs'. Note that the only difference between singular and plural possessive is the position of the apostrophe.
It is possible to avoid this by using the alternative method for showing the possessive in the English language. The singular possessive can be shown as of the song, and the plural possessive as of the songs.
The singular possessive form for melody is melody's.
Melodious or Melodic
The possessive form is Amos's.
The singular possessive form is herd's.
The singular possessive form is heart's; the plural possessive form is hearts'.
The singular possessive form is grotto's.
The singular possessive form is lesson's.
The singular possessive form is song's (the song's title).
The possessive form of the singular noun song is song's.Example: The song's writer is Dolly Parton.
The possessive form is Amos's.
The singular form is goose; the singular possessive form is goose's.The plural form is geese; the plural possessive form is geese's.
Quantum is singular, not singular possessive. The singular possessive form is quantum's.
The singular possessive form is speculum's.
The singular possessive form is frontiersman's.
The singular possessive form is aircraft's.
The singular possessive form is week's.
The singular possessive form is contralto's.
The singular possessive form is herd's.
The singular possessive form is heart's; the plural possessive form is hearts'.