conformer

transitive verb

1. to make the same or similar: to conform one's idea to another's
2. to bring into harmony or agreement; adapt: often used reflexively

intransitive verb

1. to be or become the same or similar
2. to be in accord or agreement: the house conforms to specifications
3. to behave in a conventional way, esp. in accepting without question customs, traditions, prevailing opinion, etc.
4. Eng. History to adhere to the practices of the Anglican Church