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Synonyms for Erratic (same or very similar meaning)

WordNet sense 1 (having no fixed course):
planetary, wandering

WordNet sense 2 (not settled or established):
unsettled

WordNet sense 3 (likely to perform unpredictably):
temperamental

WordNet sense 4 (not worthy of reliance or trust):
unreliable

WordNet sense 5 (liable to sudden unpredictable change):
fickle, mercurial, quicksilver

WordNet sense 6 (such that alteration is possible; having a marked tendency to change):
changeable, changeful


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