If you need to describe something that is not plentiful, there are several synonyms you can use instead of repeating the same phrase. One option is "scarce," which means something is in short supply or difficult to obtain. Another synonym for not plentiful is "limited," indicating that there is a finite amount of the item or resource. "Sparse" is also a useful word, describing something that is thinly spread out or thinly populated. Similarly, "meager" and "scant" can be used to describe something that is inadequate or insufficient. If you need a more formal phrasing, you might consider the word "paucity," which refers to a scarcity or shortage of something.