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Words getting along nicely ....
Word: efficacious (lookup in dictionary) (lookup stats) Dates: during 1950-1959 Sort By: most recent first (reverse)
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Normalized population density for word "efficacious" throughout decades:
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Word "efficacious" first appeared in our records from 173225!
See usage in 173225 »
The following words have supported "efficacious" in appearing on this page. Do you know these words: