Here are the possible solutions for they have extensions clue
Answer
Clue
Relevancy
filenames
Clue
They have extensions
Definition
FILENAME, the name of a computer file
stretchgoals
Clue
They might help you beg for project extensions
newt
Clue
Gingrich who said "females have biological problems staying in a ditch for thirty days because they get infections and they don't have upper body strength"
Definition
a tailed amphibian of the salamander family, also EWT
