overarch

As a verb overarch

is to form an arch over something.

As a noun oversight is

an omission; something that is left out, missed or forgotten.

As verbs the difference between overarch and chapter

is that overarch is to form an arch over something while chapter is to divide into chapters.

As a noun chapter is

one of the main sections into which the text of a book is divided.

Overarc is often a misspelling of overarch.

Overarc has no English definition.

As a verb overarch

is to form an arch over something.

As verbs the difference between overmarch and overarch

is that overmarch is to cause to march too far, or too often; to exhaust by marching while overarch is to form an arch over something.