Synonyms for the word "Order Solenogastres" include the scientific name Aplacophora, which refers to a group of worm-like marine invertebrates lacking a shell or a foot. Another synonym is Caudofoveata, which describes a subphylum of small, worm-shaped molluscs that have a ventral "foot", which aids in locomotion. Other related terms include aplacophoran, neomeniomorph, and solenogaster. These creatures are found in deep-sea environments and have a unique anatomy that sets them apart from other molluscs. Despite their unusual appearance and lifestyle, Solenogastres and its synonyms are still important to the marine ecosystem and have many fascinating adaptations that are yet to be fully understood.