Isohyet is a term that refers to a line on a map that connects points having equal rainfall. Some synonyms for this term include rain contour, isopleth, and rainfall line. Rain contour refers to a line that connects points having equal rainfall level, while isopleth implies a line on a map that connects points that have similar values of a particular quantity. On the other hand, rainfall line is a line that shows the distribution of rainfall levels in a particular area. Other synonyms for isohyet include isarithm, isoquant, and isoneph. The use of these synonyms can make it easier to communicate scientific information related to rainfall patterns and climate.