Found 10 stronger alternatives to upgrade your writing.
Give permission (everyday)
Nuance: Permission
Most common replacement for let.
Boring
My mom let me go to the park.
Better
My mom allowed me to go to the park.
Formal permission (rules/law)
Nuance: Official permission
Formal; often used in rules and signs.
Boring
The sign lets students enter at noon.
Better
The sign permits students to enter at noon.
Make possible (tools/systems)
Nuance: Provides ability
Use when something makes it possible.
Boring
This app lets you track your sleep.
Better
This app enables you to track your sleep.
Give official approval
Nuance: Approved officially
Business word; official permission.
Boring
The manager let the refund go through.
Better
The manager authorized the refund.
Give something requested (wishes/requests)
Nuance: Permission given
Use for requests being approved.
Boring
The teacher let us have extra time.
Better
The teacher granted us extra time.
Agree to something (formal)
Nuance: Agreed
Formal; often medical or legal.
Boring
He let the doctors perform the surgery.
Better
He consented to the surgery.
Allow something you dislike
Nuance: Put up with
Means allow to continue even if you dislike it.
Boring
I will not let bullying continue.
Better
I will not tolerate bullying.
Set free / let go
Nuance: Freed
Use for freeing or letting go.
Boring
The rescue team let the bird go.
Better
The rescue team released the bird.
Allow to enter
Nuance: Allowed in
Used for entry to places.
Boring
The usher let one person in at a time.
Better
The usher admitted one person at a time.
Give power/permission to act
Nuance: Gave authority
Often positive; leadership tone.
Boring
The teacher let students lead.
Better
The teacher empowered students to lead.