Meaning : A farm tool having one or more heavy blades to break the soil and cut a furrow prior to sowing.

Synonyms : plough

Meaning : To break and turn over earth especially with a plow.

Example : Farmer Jones plowed his east field last week.
Turn the earth in the Spring.

Synonyms : plough, turn

Meaning : Act on verbally or in some form of artistic expression.

Example : This book deals with incest.
The course covered all of Western Civilization.
The new book treats the history of China.

Synonyms : address, cover, deal, handle, treat

Meaning : Move in a way resembling that of a plow cutting into or going through the soil.

Example : The ship plowed through the water.

Synonyms : plough