There are several synonyms that can be used for the term "aspen-leaved". The first and most common one is "poplar-leaved", as aspen and poplar trees are often confused due to their similar appearance. Another option is "quaking-leaved", which refers to the tendency of aspen leaves to tremble and flutter in the breeze. "Trembling-leaved" is also a suitable synonym for the same reason. Finally, "white-leaved" can be used in reference to the silvery-white undersides of aspen leaves. Regardless of the synonym chosen, they all refer to the same characteristic feature of the aspen tree - its distinctive leaves.