XO - Executive Officer (military), second in command

Yaff – to bark like a snarling dog.

Zeta - the sixth letter, a number value of 7, in names---it means born last

Abeyance
noun: abeyance
a state of temporary disuse or suspension.
"matters were held in abeyance pending further inquiries"

Behemoth
someone or something that is abnormally large and powerful

Colloquial - used in ordinary or familiar conversation; not formal or literary

Davit - a small crane on board a ship, especially one of a pair for suspending or lowering a lifeboat.

Emacity - Desire or fondness for buying.

Fenestron - is a protected tail rotor of a helicopter operating like a ducted fan

Gobsmacked - utterly astonished; astounded.

Imbroglio - an extremely confused, complicated, or embarrassing situation.
"the Watergate imbroglio"

Jackstall - in helicopters, it's a flight configuration when the M/R blades overpower the hydraulic servos - and the controls lock solid. (The procedure to recover from it, is to off-load the main rotor blade system.)

Kitsch - art, objects, or design considered to be in poor taste because of excessive garishness or sentimentality, but sometimes appreciated in an ironic or knowing way.
"the lava lamp is an example of sixties kitsch"

Longueur - a tedious passage in a book or other work