Precipice

n. 

a very steep rock face or cliff, typically a tall one.

Examples:

We swerved toward the edge of the precipice.

figurative

The country was teetering on the precipice of political anarchy.

shoal

n.

an area of shallow water, especially as a navigational hazard.

Examples:

The ship ran aground along the shoals of the harbor.

figurative

He alone could safely guide them through Hollywood's treacherous shoals.

n.

a girl or young woman

Example

He married a lass from Yorkshire.

domain

n.

an area of territory owned or controlled by a ruler or government

a specified sphere of activity or knowledge

Example

The tribal leaders disagreed as to whose domain the northwest territories fell into.

n.

a person who is learning a trade from a skilled employer, having agreed to work for a fixed period at low wages.

Example:

The electrician's apprentice did not always follow the instructions of his master and often put others in harm's way.

n.

the largest group of naval vessels under one commander, organized for specific tactical or other purposes

a number of vehicles or aircraft operating together or under the same ownership

Example:

A fleet of ambulances took the injured to the hospital.

adj.

very skilled or proficient at something

Example:

He is adept at cutting through red tape.

n.

a group of islands

Example:

Honolulu is a harbor city at the southern end of Oahu, the most visited island of the Hawaiian archipelago.