Interpetiolar stipule is a specific term used in botany that refers to a small leaf-like structure that emerges on the side of the stem between two opposite leaves. While there are not many synonyms for this particular term, there are other similar terms that describe related structures. Some of the synonyms for interpetiolar stipule may include axillary bud, leaf stipule, or simply stipule. These terms all describe small structures that emerge on the stem or base of a leaf. While they may not be interchangeable with interpetiolar stipule in all cases, they serve to describe similar structures in botanical terminology.