The unabridged Oxford English Dictionary contains over 600,000 words.
The average native English speaker knows anywhere from 12-20,000 words depending on their level of education but only uses about 1/10th that amount in everyday speech.
Shakespeare, a masterful communicator, used over 30,000 words in his works alone!
There are so many ways to express emotions, desires, goals, accomplishments, thoughts and meaning through words. Why limit your expression? Imagine if you could only describe a sun-filled mountain vista as “good” instead of “wonderful” “gorgeous” “breathtaking” or “splendid”. What a difference in emotion these different words convey….even though they are all similar in some respect.
Kids spend an inordinate amount of time learning vocabulary in school, but as adults this practice stops – unless you read a wide variety of books or proactively study language. It’s a worthwhile thing to keep doing at any age.
Broadening your knowledge of language directly impacts your quality of life. It provides you with a far broader mechanism for interpreting the world through words, and sharing what you experience and know with others.