Yeanling is a term commonly used to describe a newborn lamb. However, there are several synonyms that can be used in place of yeanling when referring to a young sheep. One such synonym is "lambkin", which is often used in a more affectionate context to describe a young lamb. Other synonyms for yeanling include "lamb", "ewe lamb" (specifically referring to a female lamb), "spring lamb" (referring to a lamb born in the spring), and "lambing" (used to describe the act of giving birth to a lamb). Using these alternative terms can add variety and specificity to your writing or conversation about sheep.