This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

adj. Able to be attached.

adj. Capable of being attached; esp., liable to be taken by writ or precept.

Capable of being attached, legally or otherwise; liable to be taken by writ or precept.

Capable of being fastened or conjoined as an adjunct or attribute.

adj. capable of being fastened or added to something else

"Flip N’ Flush †This attachable aka "permanent" toilet seat connects between your regular seat and lid."

clip-on    bondable    tie-on    bindable   

attach   

fastenable    annexable    connectable    appendable   

locatable    getatable    graspable    degradable    transformable    countable    assessable    bioavailable    hypometric    retrievable