Lend a hand
To offer help or support.

Back someone up
To support someone’s position or opinion.

Throw your weight behind
To use one's influence to support someone or something.

Stand by someone
To support someone during difficult times.

Be in someone's corner
To be supportive of someone in a challenging situation.

Give someone a leg up
To help someone achieve success.

Hold someone’s hand
To guide or support someone in a difficult situation.

Have someone’s back
To protect or support someone, especially when they are in trouble.

Be a shoulder to cry on
To be a source of emotional support for someone.

Go to bat for someone
To defend or support someone when they are in need.

Give a helping hand
To offer help or support to someone.

Pull someone through
To help someone survive or succeed through difficult circumstances.

Stick by someone
To remain loyal and supportive even in hard times.

Take under your wing
To support or mentor someone who is inexperienced.

Rally around
To come together to support someone or something.

Prop someone up
To provide someone with the necessary support.

Be a rock for someone
To be a strong and reliable source of support.

Hold up
To support or sustain someone or something.

Stick up for someone
To defend or support someone verbally.

Give moral support
To give someone emotional or mental encouragement.