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Synonyms for Fusty (same or very similar meaning)

WordNet sense 1 (stale and unclean smelling):
musty, frowsty

WordNet sense 2 (having an unpleasant smell):
malodorous, stinky, malodourous, ill-smelling, unpeasant-smelling

WordNet sense 3 (old-fashioned and out of date):
nonprogressive, standpat, unprogressive

WordNet sense 4 (resistant to change):
conservative


From the ODE community, based on WordNetadd/edit