Do you like to go deep when exploring for weird, fun, or unusual words? If so, then Word Spelunker is the tool for you. With it you can delve deep into the bowels of macOS's dictionary file. There you can discover strange and mysterious words that you can use for usernames or product names or unique insults to yell at rude drivers.
With features like a macOS (i.e. OS X) Dictionary lookup button and a Google Define button you'll have hours and hours of fun not only finding new word but learning their meanings.
Features include the ability to search for words that:
a string of letters of your choosing.
Best of all, all of this language exploring is free. Free! (There is a donate button in the about dialog but, that's something I put there for my own amusement.)
What are you waiting for? Scroll down to the bottom this page and download this amazing program and start your word adventures now.
Oh, and here's a screen shot to whet your appetite for word discovering and dictionary file exploring: