The total number of words in the English language is estimated to be around 170,000. This includes both common and less common words, which can vary depending on the source and criteria used for counting. Some sources estimate the number to be higher, up to around 500,000 words, while others suggest it may be as low as 30,000. However, it is important to note that these estimates can vary greatly and are not always accurate. Additionally, the number of words in any language is constantly changing as new words are added or old ones become obsolete. Despite this, the 170,000 word estimate is a widely accepted and commonly used figure.