back + flow
backflow (countable and uncountable, plural backflows)
You can also try words with the phrase BACKFLOW, words starting with the letters BACKFLOW, or words ending in the letters BACKFLOW.
Words… ending with q, starting with q, starting with qa, starting with qo, with two letters, starting with x, starting with j, ending with j,
Some random searches:
QNNIVCD, PDZAXYX, PVFWBFY, VHQZRI, JNXZMBA, OZP,