margin

generous, wide

The document had a wide margin at the top for the teacher's comments.

at the ~

The teacher always leaves space at the margin for writing comments on student essays.

in the ~

The teacher wrote helpful comments in the margin of my essay.

by a ~

The home team won by a narrow margin in the final seconds of the game.

~ over

The home team won by a comfortable margin over their opponents in yesterday's match.

by the largest/narrowest, etc. of margins

The team lost the championship by the largest of margins in a disappointing final match.

good, greater, wide

The team won by a good margin in the final match last weekend.

allow (sb/sth), give (sb/sth), leave, provide

The new deadline allowed us a comfortable margin for completing the project.

~ for

She always leaves a small margin for error when planning her travel schedule.

a margin for/of error

When cooking, you should always allow a margin for error with the temperature.

low, narrow, small, tight

The shop operates on a narrow margin, so the owner carefully controls costs.

achieve, have

The company achieved a comfortable profit margin after cutting production costs.

improve, increase

By cutting production costs, the company was able to improve its profit margin significantly.

cut, erode, reduce, squeeze

The company had to cut its profit margin to compete with cheaper rivals.

at a ~

The small bakery operates at a thin margin, so they cannot afford to waste ingredients.

~ on

The bakery increased its profit margin on specialty cakes last year.