Constraint vs Confront - What's the difference?

As a noun constraint

is something that constrains.

to stand or meet facing, especially in competition, hostility or defiance; to come face to face with; to oppose; to challenge.

(wikipedia constraint)

(en noun)

Something that constrains.

(mathematics) A condition that a solution to an optimization problem must satisfy.

A restriction.

* constraint satisfaction

(en verb)

To stand or meet facing, especially in competition, hostility or defiance; to come face to face with; to oppose; to challenge.

We should confront him about the missing money.

To deal with.

To something bring face to face with.

To come up against; to encounter.

To engage in confrontation.

To set a thing side by side with; to compare.

To put a thing facing to; to set in contrast to.

* confrontation * confrontational * confronter * confrontment