Regions'
The plural of compass is compasses, and the plural posessive is compasses'(referring to more than one compass).
Regional is chiefly used as an adjective. People tend use the word 'regionals' when using the noun form of regional. For example: "Regionals are finding the competition from national firms overwhelming" or "Collingwood won the regionals"
The plural of locality is localities.
The plural form is areas.
The plural of topography is topographies. As in "these topographies are interesting".
Years'
Uncles'
Painters'
The plural posessive form is nests'.
The plural form of the noun lynx is lynxes.The plural possessive form is lynxes'.
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'
The plural of compass is compasses, and the plural posessive is compasses'(referring to more than one compass).