Decennary is a 9 letter English word.
You can make 297 anagrams from letters in decennary (acdeennry).
1815-25; Latin decenn(is) of ten years (dec(em) ten + -ennis, combining form of annus a year) + -ary
decennary, de-sen′ar-i, n. a period of ten years—also Decenn′ium.