Quick answer
How many words are in the English language?
Quick answer
How many words are in the English language?
There is no definitive count. Large English dictionaries list between 170,000 and 250,000 words in current use, while comprehensive word lists used by word games and spellcheckers contain 270,000 or more once inflected forms such as plurals and past tenses are included. Counts including technical and scientific terms run to over a million.
In more detail
The disagreement is about what counts as a word rather than about the evidence. Whether RUN, RUNS, RAN and RUNNING are one word or four is an editorial decision, and it alone moves the total by tens of thousands.
Word games need permissive lists, because players expect plurals and verb forms to be playable. General dictionaries prefer headwords, because readers want meanings rather than forms.
This site uses a list of over 270,000 words for matching, and attaches definitions from WordNet where one exists, which is why some valid results have no definition attached.