embellishment vs boule

embellishment and boule both are nouns.

Word	Noun	Adjective	Verb	Adverb
embellishment	Yes	No	No	No
boule	Yes	No	No	No

As nouns, boule is a hyponym of embellishment; that is, boule is a word with a more specific, narrower meaning than embellishment:

embellishment: a superfluous ornament
boule: an inlaid furniture decoration; tortoiseshell and yellow and white metal form scrolls in cabinetwork

Other hyponyms of embellishment include boulle, buhl, cuspidation, festoon, filagree, filigree, fillagree, vermiculation, flourish.

embellishment (noun)	boule (noun)
the act of adding extraneous decorations to something	an inlaid furniture decoration; tortoiseshell and yellow and white metal form scrolls in cabinetwork
a superfluous ornament
elaboration of an interpretation by the use of decorative (sometimes fictitious) detail