Thread is a commonly used word in various contexts, from sewing to online forums. However, there are plenty of synonyms that can be used instead of thread, depending on the particular context. Some potential options could include string, yarn, cord, filament, cable, line, rope, wire, or even strand. In the context of online threads or conversations, alternatives could include discussions, chats, or conversations. Additionally, in the context of physical objects, synonyms for thread could include bolts, screws, or nails. It is always important to choose the most appropriate synonym to convey the intended meaning accurately.