You asked for synonyms.. Hold onto = Grab, grip, grasp (Hold onto the rail tightly while you're using the stairs.) Hold out = resist (Don't give in! Hold out until the very end!) Hold up = wait (Dude! Hold up! I forgot my phone.) Uphold = enforce (As a judge, he promised to uphold the laws.) Withhold = remove, deny (If you don't stop whining, I will withhold any further treats.) Hold on = can mean grip or grasp, can also be used to indicate wait or pause (Hold on while I get my purse.) Hold = embrace, keep (Hold onto me, I feel weak.)

I agree that it's best to ask about one thing at a time, Hasan. Asking about verbs, whether they are one-word or multi-word verbs, isn't always useful. If you ask about them in context, you'll get a clearer answer. For example: "HOLD ON tight to something, the ship rocks a lot" (grab on firmly) "HOLD ON a minute" (wait a minute) and "HOLD UP, you're walking too fast" (wait) "We were HELD UP at passport control" (past of HOLD UP, meaning 'delayed').

Thank you all. I did google that but the answers was difficult to understand.

How about 'hold on to that thought', Aaron? or 'hold up your end of the bargain'?

Well if it helps, Hold, Hold onto, Hold on, and Hold up, are for physically holding things and the rest are not