Have you ever heard about "the word of the day"? It is a great way of improving our vocabulary and learn new words at all times. It is also a great resource to be used in class because it fosters our student's curiosity when they look for it, understanding its meaning, contexts in which it can be used and its pronunciation.
Here you are an example taken from the following webpage: www.dictionary.com/wordoftheday/
You have different webpages in which these words can be daily found. In twitter, you will also find brief information about it. So if your objective is enriching your vocabulary, have a peep at it! 👀