How many word types are there?

The number of Word types in a language can vary significantly based on its vocabulary and structure. In English, for instance, there are thousands of Word types, including nouns, verbs, adjectives, adverbs, pronouns, prepositions, conjunctions, and interjections. Estimates suggest that there are over a million distinct Word forms when considering different inflections and derivations. However, the exact number of Word types can change with new Words being created and others falling out of use.