This word contains 4 identical consonants, 2 identical vowels and another 2 distinct vowels.
Not in everyday use, still a valid English word for you to find.
Please include in your answer the word, its meaning
and the way you recovered it.
The word is "nonunion", since it contains:
-> 4 identical consonant "n".
-> 2 identical vowels "o".
-> another two distinct vowels "u" and "i".