Back out – to change your mind and decide not to do something "I'm nervous about making a speech tomorrow, but I don't want to back out now."
Fill out – to complete "Please fill out this paperwork. You will need to write you name, address, age and occupation."
Stand out – to be obvious, noticeable, very clear to see."She really stands out in the crowd wearing that orange jacket."
Break out – to escape "A prisoner broke out of prison. The police are looking for him."
Eat out – to eat in a restaurant "After cooking all week, it's nice to eat out on the weekend."
Hand out – to distribute, to give, pass out "The teacher handed out exam papers to all the students."
Cut out – to remove completely "She cut out a picture of her favourite singer from my magazine!