Reerect is a verb that means to put something, usually a structure or building, back into its original upright position. Some synonyms for reerect include rebuild, reconstruct, restore, and repair. When used in the context of a building or structure that has collapsed or been damaged, other synonyms can include renovate, refurbish, and rehabilitate. In addition to these synonyms, there are also more specific words that can be used depending on the context, such as reinforce, prop up, and shore up. Ultimately, the choice of synonym will depend on the specific situation and what best captures the intended meaning.