attachment vs tying

attachment and tying both are nouns.

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

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

Other hyponyms of attachment include bonding, soldering, doweling, earthing, grounding, linkage, ligature, welding, fixation.

attachment (noun)	tying (noun)
the act of fastening things together	the act of tying or binding things together
the act of attaching or affixing something
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