The term "unknittable" refers to something that cannot be unraveled or undone. However, there are several synonymous words that convey a similar meaning. One alternative is "unravelable", suggesting that the object or material is unable to come apart. Another synonym is "unbreakable", highlighting that the item cannot be broken or dismantled. Similarly, "indestructible" implies that the object is resistant to damage or destruction. Additionally, the word "imperishable" describes something that cannot be destroyed or decomposed. When seeking alternatives to "unknittable", these synonyms provide different options to convey the same sense of strength and durability.