#let:a

a person who likes cats; cat fancier

an imaginary, undying flower

to make indifferent or hostile; to cause to be withdrawn or isolated from the objective world; to turn away; transfer or divert

This is the longest word using vowels in order (exactly once). A tip of the blue Dictionary.com cap to Mental Floss for this one. The 11-letter AEIOU word is abstentious, which means you don’t indulge to excess (a variant of the word abstain). (source)

a finely granular variety of gypsum, often white and translucent, used for ornamental objects or work, such as lamp bases, figurines, etc.

a deposit of sand, mud, etc., formed by flowing water

regarding the human being as the central fact of the universe

a movable surface, usually near the trailing edge of a wing, that controls the roll of the air frame or effects maneuvers, as banks and the like; a wall at the end of a roof with a single slope, as that of a church aisle