This is a simple vocabulary builder, based upon a
list of about 35000 words.

To see new words, keep refreshing your browser.
When you are confident that you know a word,
check the checkbox next to it, and then that word
not appear again.

Everything is stored in your browser's local cache,
so whenever you clear your local cache, the entire
word list will become unchecked again.

© Ken Perlin 2022