Seventy is a cardinal number that represents the quantity that is ten times greater than seven. It is commonly used to describe a specific amount or to indicate a specific age. There are a few synonyms for this number, such as "three score and ten" or "threescore." Both these phrases refer to the number 70 and are expressions that are used in the English language to describe 70 years of age. Other synonyms for seventy may include four score and ten, septuagenarian, or LXX. These synonyms can be used interchangeably to convey the same meaning in different contexts.