When formatting a document, it's essential to understand the various synonyms for the term "single space." Some alternatives include "1.0 spacing," "line spacing set to one," or "one-line interline spacing." These terms indicate that there is only one blank line between each line of text in a particular document. In contrast, "double spacing" refers to two blank lines between text lines, and "1.5 spacing" indicates there is one and a half lines between them. Knowing these synonyms is crucial when formatting research papers, essays, or any formal document, as specific guidelines may require a particular spacing style.