What is another word for top up?
Pronunciation: [tˈɒp ˈʌp] (IPA) 
The phrase "top up" means to add more to something, typically to fill it up to the desired level. There are several synonyms you can use to convey the same meaning, including replenish, fill up, refill, add to, and augment. Other options include supplement, boost, increase, top off, and restock. Each of these words can be used interchangeably with "top up," depending on the context and the item being filled. For example, you might say you need to top off your gas tank, but you need to refill a bottle with water. Regardless of which word you choose, the intention is to add more to something in order to bring it to the desired level.
