https://en.wikipedia.org/wiki/English_words_first_attested_in_Chaucer

English words first attested in Chaucer, or special manuscript words of Chaucer, are a set of about two thousand English words that Geoffrey Chaucer is credited as being the first use found today in existing manuscripts. This does not necessarily mean that he was the person to introduce these words into English, but that the earliest extant uses of these words are found in Chaucerian manuscripts. Many of the words were already in everyday speech in 14th-century England (especially London). The claim is that these words are found for the first time in written manuscripts where he introduced them in one of his extensive works from 1374 to 1400 as the first author to use these particular words. Many of Chaucer's special manuscript words from the 14th century are used today:

absent, accident, add, agree, bagpipe, border, box, cinnamon, desk, digestion, dishonest, examination, finally, flute, funeral, galaxy, horizon, infect, ingot, latitude, laxative, miscarry, nod, obscure, observe, outrageous, perpendicular, Persian, princess, resolve, rumour, scissors, session, snort, superstitious, theatre, trench, universe, utility, vacation, Valentine, veal, village, vulgar, wallet, and wildness.

https://www.huffingtonpost.com/2014/12/09/milton-new-words_n_6290576.html

Dec. 9 is the seminal poet, polemicist and scholar’s 406th birthday, and in honor of his special day, we’d like to celebrate his unparalleled linguistic genius. Here are 11 of the coolest, most useful and most commonly used words originally coined by Milton:

pandemonium: Used today to refer to a state of utter chaos and uproar, Milton created this term, which roughly translates to “all demons,” to name the capital of hell in his epic Paradise Lost.

lovelorn: Forsaken by one’s lover. Milton used it to describe a nightingale in his work Comus.

unoriginal: Even the word unoriginal was once original; Milton was the first to use it. It appears in Paradise Lost in the line “unoriginal Night and Chaos wild,” and has been interpreted there to mean both its current meaning and primeval, without origin.

earthshaking: Used as an epithet for the god Neptune in Comus, it typically means extremely momentous.

space: Milton is believed to be the first to have used this word to refer to “outer space,” paving the way for space travel, space probes, “2001: A Space Odyssey” and more.

enjoyable: We use this word to describe pleasant experiences all the time, thanks to Milton.

fragrance: A scent, usually a pleasant one.

sensuous: Pleasing to the senses, not the intellect. Milton is believed to have coined the word to make a distinction from sensual, which typically refers more directly to sexual pleasures.

debauchery: This refers to sensual overindulgence or hedonism.

terrific: We now use terrific to mean great or awesome, but Milton originally used it to mean something much more like terrifying, in describing the creation of snakes in Paradise Lost — it was derived from the same Latin root.

goosery: Alas, this one hasn’t become commonly used. Milton used it to mean silliness (befitting a goose). In his pamphlet “Apology for Smectymnuus,” he critiqued “finicall goosery of your neat Sermon-actor.”

https://press.uchicago.edu/ucp/books/book/chicago/I/bo8779953.html

https://en.wiktionary.org/wiki/cosmos

https://en.wikipedia.org/wiki/Consummation

https://en.wikipedia.org/wiki/Old_Occitan

https://en.wikipedia.org/wiki/Romance_languages

https://en.wikipedia.org/wiki/Troubadour

https://www.billboard.com/articles/columns/hip-hop/8470363/nicki-minaj-queen-best-lyrics

https://en.wikipedia.org/wiki/Valentine%27s_Day#Chaucer's_love_birds

https://en.wikipedia.org/wiki/Rondeau_(forme_fixe)

https://en.wikipedia.org/wiki/Rondo

https://www.sfpix.com/park/history/monarch/