General usage:
* Storage: the act of storing things
* Damage: harm or injury
* Passage: a way through or a section of a text
* Voltage: the electrical potential difference
* Dosage: the amount of medicine to be taken
* Mileage: distance travelled in miles
* Wages: money earned for work
* Percentage: a part of a whole expressed as a fraction of 100
* Average: the typical value of a set of numbers
* Package: a bundle or container of goods
Less common, but still valid:
* Apparage: a payment made to a woman in lieu of dowry
* Bornage: the act of fixing boundaries
* Carriage: the act of carrying or transporting
* Foilage: a collection of leaves
* Herbage: plants used as food for livestock
* Pillage: the act of stealing or plundering
* Scabble: a rough, uneven surface
* Virago: a strong, loud, and aggressive woman
* Voyage: a journey, especially by sea or in space
Words that are no longer in common use:
* Bridage: a bridge or pathway
* Gallage: a gallnut, a growth on a tree caused by insects
* Litage: the act of litigating, or engaging in a lawsuit
* Ravage: destruction or devastation
* Scourrage: a scourge, a cause of great suffering
This list is not exhaustive, but it gives you a good starting point.