The term "super-strong" can be replaced with a variety of synonyms depending on the context. For example, words like "powerful," "mighty," and "invincible" can be used to describe physical strength. "Robust," "vigorous," and "brawny" are also suitable alternatives. In terms of emotional or mental strength, "resilient," "tough," and "determined" can be used. "Tenacious," "unyielding," and "unwavering" are also good choices. If describing the strength of a material or object, "durable," "sturdy," and "robust" are more appropriate synonyms for "super-strong." Ultimately, the choice of synonym will depend on the specific context and desired connotations.