As nouns the difference between terms and sexcentenary
is that terms is while sexcentenary is a six-hundredth anniversary.
As an adjective sexcentenary is
of or pertaining to the number six hundred, or to a six hundred year period.
terms
English
Noun
(head)
Statistics
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sexcentenary
English
Adjective
(-)
Of or pertaining to the number six hundred, or to a six hundred year period
Noun
(sexcentenaries)
A six-hundredth anniversary