Sometimes after so much writing most of us all know that cycle one can get into when you've simply exhausted all the variations of words you know for a particular verb or adjective. A common example is laughing and chuckling. It's hard to think of different words for all the different kinds of 'laughter' we have, and it's a very common action by characters especially those who are cheery or easily amused.
You can describe this laugh or chuckle, but you're still using the word laugh or chuckle in that description. There are a lot of words that we use frequently because they're part of actions that just happen to occur all the time for certain characters, but we don't necessarily know or remember all the variations that can widen our vocabulary to keep us out of those cycles of *He chuckles* *She chuckles* *He grins* *She smiles* *He laughs before it eases into a chuckle* etc, as a simple example. Most of you know what I'm talking about.
TLDR:
That's why I wanted to make a thread where we can post different uncommon words (and a brief description of what they mean or what their synonym is) which we can come back to and look at for some inspiration or ideas for varying the words in our stories and actions. I actually have a little text document on my computer called 'Words I Should Use' which gave me the idea for this.

Thinking:
muses : to think about or say something carefully or thoroughly or thoughtfully: akin to wonder, marvel, ponder (ex:she muses)
Movement/Action:
cant : to set at an angle : akin to tilt, slant, shift, angle (ex:she cants her head)
bout : a short period of intense activity of a specified kind. : akin to outburst, fit, convulsion (ex: he had a bout of anger)
feigned : pretend to be affected by a feeling, state, or injury : akin to pretend, fake (ex: she feigned her illness)
chortle : to laugh because you are amused or pleased by something : akin to chuckle, giggle, laugh, titter, snicker, cackle (ex: he chortled softly at the jest)
Feeling:
disconcerting : to make (someone) upset or embarrassed : akin to unsettling, rattle, mortify, fluster (ex: the news about the criminal's identity was disconcerting to their friends)
Speaking:
banter : talk or exchange remarks in a good-humored teasing way : akin to quip, jest, wisecrack (ex: they always banter with one another )
Description/Adjective
terse : brief and direct in a way that may seem rude or unfriendly : akin to curt, concise, brief (ex: he spoke so tersely he made a bad impression)
I'll add more later.

Anyone have any others they can add?