Sweetpea is a term commonly used for the flowering plant Lathyrus odoratus. However, there are several other synonyms that can be used to refer to this beautiful plant. One such term is "perfume plant," which is derived from the sweet fragrance that characterizes the flowers. Additionally, sweetpea can also be referred to as "everlasting peas" or "winter peas," which describe the plant's hardy nature and its ability to survive even during the coldest months of the year. Some people also refer to sweetpea as "poet's eyes" or "catgut" due to the string-like stems of the plant that are sometimes used in making musical instruments.