Arcseconds, also known as "arc-seconds," are a unit of measurement that is commonly used in astronomy to measure angles. Some synonyms for the word arcseconds include "seconds of arc," "arc minute," and "minute of arc." These terms all refer to the same unit of measurement and can be used interchangeably. Additionally, other synonyms for arcseconds include "angular measurement," "astronomical unit," and "celestial measurement." The use of these synonyms can help to clarify discussions and measurements in the field of astronomy and can also help to make the information more accessible to a wider audience.