attachment vs ligament

attachment and ligament both are nouns.

Word	Noun	Adjective	Verb	Adverb
attachment	Yes	No	No	No
ligament	Yes	No	No	No

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

attachment (noun)	ligament (noun)
the act of fastening things together	any connection or unifying bond
the act of attaching or affixing something	a sheet or band of tough fibrous tissue connecting bones or cartilages or supporting muscles or organs
faithful support for a cause or political party or religion
a supplementary part or accessory
a connection that fastens things together
a writ authorizing the seizure of property that may be needed for the payment of a judgment in a judicial proceeding
a feeling of affection for a person or an institution