millenary / millinery are similar-sounding terms with different meanings (referred to as homophones). To better understand the differences, see below for definitions, pronunciation guides, and example sentences using each term. 👇
millenary: (noun) a sum or aggregate of one thousand (especially one thousand years). (adjective) of or relating to the doctrine of the millennium. (adjective) relating to or consisting of 1000.
millinery: (noun) shop selling women's hats. (noun) hats for women; the wares sold by a milliner.
millenary: NA
millinery: NA
(Examples are Wikipedia snippets under the CC ShareAlike 3.0 license. Definitions drawn from WordNet.)