Nouns are the words that have a possessive form. The word 'live' is not a noun. The word 'live' is a:
verb: to remain alive, to exist, to dwell (live, lives, living, lived)
adjective: not dead or inanimate (a live performance)
adverb: appearing in person, at an actual event (performing live)
The possessive form of the plural noun lives is lives'.
Example: My parents moved to a warm climate for their lives' ease.
The plural is relatives. The plural possessive is relatives'.
The plural is lads. The plural possessive is lads'.
The plural form is Mexicans. The plural possessive is Mexicans'.
The plural possessive of stepsister is stepsisters'.
The plural form is inches. The plural possessive is inches'.
The plural form is suffixes. The plural possessive is suffixes'.
The plural form is echoes. The plural possessive is echoes'.
Coaster's is singular possessive. The plural is coasters, the plural possessive is coasters'.
The plural possessive is pals'.
Studies' is the plural possessive of study.
The plural possessive form of "weeks" is "weeks'."
The plural possessive of bandit is bandits'.