There is no exact number for how many five-letter words are in the English language, as new words are added to the language over time and different sources may include or exclude certain words.
However, it is estimated that there are around 40,000 to 50,000 five-letter words in the English language. This number can vary depending on how you define a “word” and what sources you consult.
It’s worth mentioning that the English language is constantly evolving and new words are added to it, therefore this number is not a fixed one. And also, this number is an approximation, and it’s hard to give a precise number.