The term 'attach to' can be defined as connecting or joining one thing to another. This term can be expressed in a variety of ways, such as PINON (5 letters), FASTEN (6 letters), AFFILIATE (9 letters), APPEND (6 letters), AFFIX (5 letters), and ADD (3 letters). Pinon is a verb meaning to attach something with a pin or nail. FASTEN is a verb meaning to secure or make something firm. AFFILIATE is a verb meaning to join or connect with an organization or group. APPEND is a verb meaning to ADD something to the end of a document or list. AFFIX is a verb meaning to attach or stick something to something else. Finally, ADD is a verb meaning to join or unite two or more things together.