Attach verb - To cause (something) to hold to another.
Usage example: you can attach the buttons to the puppet with fabric glue
Fasten is a synonym for attach in activity topic. In some cases you can use "Fasten" instead a verb "Attach", when it comes to topics like joining, assemble, stick, affix. popular alternative
Fasten verb - To cause (something) to hold to another.
Usage example: use this paper clip to fasten your picture to the application form
Attach is a synonym for fasten in activity topic. You can use "Attach" instead a verb "Fasten", if it concerns topics such as addition, assemble, fix, stick. popular alternative
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Google Ngram Viewer shows how "attach" and "fasten" have occurred on timeline