attachment vs fondness

attachment and fondness both are nouns.

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

As nouns, fondness is a hypernym of attachment; that is, fondness is a word with a broader meaning than attachment:

Other hypernyms of attachment include affection, affectionateness, heart, philia, tenderness, warmheartedness, warmness.

attachment (noun)	fondness (noun)
the act of fastening things together	a quality proceeding from feelings of affection or love
the act of attaching or affixing something	a positive feeling of liking
faithful support for a cause or political party or religion	a predisposition to like something
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