the same; the said — used as a prefix in written language to indicate sameness or reference to the previously mentioned item.
申し込み書は同日必着でお願いします。
Please ensure the application arrives on the same day.
別紙の同番号をご参照ください。
Please refer to the same number on the attached sheet.
契約書には『同条』と記載されている部分がある。
There are parts in the contract described as 'the same article'.
likewise — used to indicate similarity or agreement; a somewhat literary/old-fashioned usage.
彼はそうすると言った。私も同に思う。
He said he would do so. I think likewise.
前の委員も同の見解を示している。
The previous committee has expressed the same view.