The plural noun for lynx is lynxes or lynx.
Years'
Uncles'
Painters'
The plural possessive of region is regions'.
The plural posessive form is nests'.
singular
The plural form for the noun louse is lice; the plural possessive is lice's.
The knife's edge had been dulled when it hit the rock. Knife's is singular posessive. The knives' edges had been dulled when they hit the rock. Knives' is plural posessive.
Waitresses.
The noun members is the plural form for member; the plural possessive form is members'.
The singular form of the noun is stapler. The singular posessive form of the noun would be stapler's. The plural form of the noun would be staplers. The plural posessive form of the noun would be staplers'