From flag + -y.
flaggy (comparative more flaggy, superlative most flaggy)
You can also try words with the phrase FLAGGY, words starting with the letters FLAGGY, or words ending in the letters FLAGGY.
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:
QQNE, TWXRA, QQYECWL, NBRMLO, ISO, EEM,