Definition 2 is interesting as well:

1. An object that serves as a focal point of attention and admiration.

2. Something that serves to guide. [French, Ursa Minor (which contains the guiding star Polaris), from Latin cynosūra, from Greek kunosoura, dog's tail, Ursa Minor : kunos, genitive of kuōn, dog; see kwon- in Indo-European roots + ourā, tail; see ors- in Indo-European roots.]

(from thefreedictionary.com)

Personally, I love learning the occasional new word. "sinecure" is useful, as is "copacetic".

now I feel bad about editing it away :D

That's the problem with 'fun', obscure words. No matter how good they sound, the piece overall sounds better without them --- an instance (by no means the only) of the well-worn truism 'kill your darlings'.

Thinking about this specific instance carefully. There's a sort of tipping point and if words are on the too-fancy side of it, they (as it were) cost too much to bring in a good return-on-investment.

Better to sort of moneyball the smaller words, getting them 'cheap', and in quantity, to produce whatever overall effect you like. Don't carve boulders, shape concrete.