High-visibility is a term primarily used to refer to a degree of conspicuousness or conspicuity. Synonyms for high-visibility include easy to see, bright, noticeable, striking, and vivid. These are words that can be used interchangeably with high-visibility to convey the same meaning. Other suitable synonyms are prominent, apparent, and eye-catching. These synonyms are commonly applied to describe safety equipment, warning signs, reflective clothing, and other items that need to catch a person's attention easily. Using different synonyms or variations of the same term can help in improving the readability and variety of your writing or presentation.