Imperforated is an adjective that means something that is not perforated or lacks perforations. Some synonyms for imperforated are unperforated, solid, unbroken, intact, sealed, hermetic, impervious, airtight, closed, and tight. These words are commonly used to describe objects that are completely closed or do not have any sort of openings, such as a sealed envelope or a tightly closed jar. Imperforated can also be used to describe something that is lacking holes or pores, such as an imperforated filter or an imperforated membrane. These synonyms provide alternate ways of conveying the same meaning as imperforated, allowing for more diverse and vivid language.