singular
The plural possessive of region is regions'.
The plural form for the noun louse is lice; the plural possessive is lice's.
The plural form of the noun lynx is lynxes.The plural possessive form is lynxes'.
The plural possessive of lady is ladies'.
centipede's in a singular possessive. centipedes' is the plural possessive
The plural of compass is compasses, and the plural posessive is compasses'(referring to more than one compass).
The noun members is the plural form for member; the plural possessive form is members'.
Waitresses.
The centipede's feet is the singular possessive form.
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.
The word century's is the possessive form of the singular noun century.The plural noun is centuries.The plural possessive form is centuries'.Example: Several centuries' records were destroyed in the war.
The word husband's is the possessive form of the singular noun husband.The plural noun is husbands.The plural possessive form is husbands'.Example: We must applaud our husbands' efforts to plan the party.