UNIQUE WORDS game to increase our vocabulary - alphabetical order

Lingua franca 

"A language that is adopted as a common language between speakers whose native languages are different."

Nidicolous:  Remaining in the nest after hatching until grown or nearly grown. Used of a bird;

Sharing the nest of another species of animal.

PACATION - The act of soothing or calming something, derived from the Latin word for “peace,” pax

Rarissima

"Extremely rare books."

Touchstone:  a hard black stone, such as jasper or basalt, formerly used to test the quality of gold or silver by comparing the streak left on the stone by one of these metals with that of a standard alloy.

an excellent quality or example that is used to test the excellence or genuineness of others.

Vermeil:  1. Vermilion or a similar bright red color

2. Gilded silver, bronze, or copper.

Xenelasia:  a custom prohibiting strangers or foreigners from residing at Sparta and empowering magistrates to expel them

Zestless: lacking excitement, enthusiasm, or passion.

dull, passionless, unenthusiastic.