interchangeably
adv. B2 Upper Intermediate US //ˌɪnɝˈtʃeɪndʒəbɫi// UK //ˌɪntətʃˈeɪndʒəbli// in·ter·change·ably
adv. in a way that allows you to use one thing instead of another without any problem. You use this when two words or things have the same meaning.
adv. in a manner that allows one thing to be substituted for another without loss of meaning or effect.
You can use these two words interchangeably in this sentence.
The two brands of batteries are often used interchangeably because they have the same size and power.
While the two theories were once considered distinct, modern scholars argue that they are largely interchangeable when applied to the study of urban development in the late nineteenth century.
From interchangeable + -ly.