interchangeable
adj
~ (with sth) that can be interchanged, esp without affecting the way in which sth works 可交换的, 可互换的, 可交替的(尤指不影响操作的)
a machine withinterchangeable parts 零件可替换的机器
True synonymsare entirely interchangeable (with one another). 真正的同义词是完全可以(彼此)互换的.