The number "seventy-eight" is a cardinal number that stands for the numerical value 78. Some common synonyms for "seventy-eight" include "78", "LXXVIII" (in Roman numerals), "threescore and eighteen", "six dozen and six", and "seventy and eight". Other less commonly used synonyms include "4.5 dozens", "novogintillion", "hemieicosahectagon", "trihectoctacontadeuteragon", and "tetracontakaiandecahectadigon". These synonyms can be used interchangeably with "seventy-eight" depending on the context in which the number is being used.