expansion vs embroidery

expansion and embroidery both are nouns.

Word	Noun	Adjective	Verb	Adverb
expansion	Yes	No	No	No
embroidery	Yes	No	No	No

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

expansion: a discussion that provides additional information
embroidery: elaboration of an interpretation by the use of decorative (sometimes fictitious) detail

Other hyponyms of expansion include expatiation, embellishment.

expansion (noun)	embroidery (noun)
the act of increasing (something) in size or volume or quantity or scope	decorative needlework
adding information or detail	elaboration of an interpretation by the use of decorative (sometimes fictitious) detail
a discussion that provides additional information
a function expressed as a sum or product of terms