There are several synonyms for the word "larker" which essentially means someone who is idle, lazy, or lethargic. Some of the commonly used synonyms for "larker" include words such as slacker, loafer, idler, wastrel, shirker, and loiterer. Each one of these words represents a slightly different connotation or nuance. For example, "shirker" may suggest someone who actively avoids work or duties, while "idler" may convey someone who is simply not doing anything productive. Choosing the right synonym for a particular context can help to convey a more precise meaning or tone and improve communication.