Expand your Russian vocabulary with this handy app. You can use this app to find any Russian word that contains letters together or apart.
Choose the letters that you want the words to contain and whether it's together or apart and you will see all the Russian words that fit the criteria.
So if you put ба and "letters together" there are over 8000 words like аба, антибакхий etc. If you put ктер and "letters separately" you would get thousands of words like аккредитующий, аккуратное etc
Your results will appear in three columns: the first column is the word, the second column is whether it's singular or plural and third column is the gender.