Collocations for attached - adj.

be
become, get, grow
We've grown very attached to this town and wouldn't want to move.

remain

deeply, strongly, very
quite
emotionally

to
George is obviously very attached to you.

be
remain, stay

firmly, securely
Make sure all the wires remain firmly attached.

loosely
directly
permanently
physically

to
The ball was attached to a chain.

Attached is used with these nouns:
document, garage