SYZYGY.
My spellchecker is telling me, “No, no, Ibby darling. I hate to disappoint you, but SYZYGY is not a word. It simply does not exist.”
And I bet some of you are saying or thinking the same (though perhaps not in so many words).
BUT. I am here to tell you, dear reader, that SYZYGY is, in fact, an actual word–and my new favorite one, at that. No, I don’t need to spell SYZYGY with all caps, but it has three Y’s and a Z and it’s fun to say. Hence: SYZYGY.

I’m having way too much fun with this.
~
Here’s the Dictionary.com definition:
syz·y·gy   [siz-i-jee]
noun, plural -gies.
1.
Astronomy . an alignment of three celestial objects, as the sun, the earth, and either the moon or a planet: Syzygy in the sun-earth-moon system occurs at the time of full moon and new moon.
2.
Classical Prosody . a group or combination of two feet, sometimes restricted to a combination of two feet of different kinds.
3.
any two related things, either alike or opposite.
~
Dear reader, if you can use syzygy (correctly!) in a conversation this week, you deserve brownie points. Why don’t you comment so I can award them to you?
~Ibby