attachment vs bonding

attachment and bonding both are nouns.

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

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

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

attachment (noun)	bonding (noun)
the act of fastening things together	fastening firmly together
the act of attaching or affixing something	(dentistry) a technique for repairing a tooth; resinous material is applied to the surface of the tooth where it adheres to the tooth's enamel
faithful support for a cause or political party or religion	a close personal relationship that forms between people (as between husband and wife or parent and child)
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