Lagger is a word commonly used to describe an individual who lags behind or falls behind others. However, there are a number of synonyms for the word that can be used in its place to convey a similar meaning. Some common synonyms for lagger include straggler, dawdler, loiterer, lag-behind, and slowpoke. Each of these words can be used interchangeably with lagger to convey the idea of someone who is slow to keep up with others or who falls behind the group for one reason or another. Choosing the most appropriate synonym will depend on the context and tone of the sentence in which the word is used.