How many letters are in the longest word on this list?The largest word on this page is 'radiopharmaceutical'. It has 19 letters.
How many words can you make using the specified combination?There are up to 24 words using our list of words that start with 'r' and contain 'iop'.
Which word from this list is the most unique?By far the most unusual word from this list is 'radiophony'. The dictionary defines it as "The art or practice of using the radiophone.".