Question: words that are in the spelling bee?
Answer: GLADIOLUS // 1925. The word (a type of flower) is notable not due to its complexity, but because it was the first-ever winning word.
ALBUMEN // 1928. The white part of an egg.
PROMISCUOUS // 1937. ... 
CRUSTACEOLOGY // 1955. ... 
SYLLEPSIS // 1958. ... 
SMARAGDINE // 1961. ... 
ESQUAMULOSE // 1962. ... 
MACULATURE // 1979.