The phrase "are treated interchangeably" is correct and usable in written English.
It can be used when discussing two or more items, terms, or concepts that can be used in place of one another without significant difference in meaning.
Example: "In many contexts, the terms 'data' and 'information' are treated interchangeably."
Alternatives: "are used synonymously" or "are considered equivalent".
The terms have not been treated interchangeably, and editors acknowledge that it is good to be on guard against doing so.
Giant pterosaur anatomy, functional morphology and, in the case of Pteranodon at least, sedimentary context all indicate that they were flighted animals and, likewise, clear anatomical distinctions between birds and pterosaurs indicate that only basic mechanical details can be treated interchangeably.
For most X-rays or gamma rays that are used for medical purposes, dose in Gy and dose equivalent in Sv are numerically the same, and in the present report the dose in Gy will be treated interchangeably with the dose equivalent in Sv).
The two major experimental species, C. intestinalis and C. savignyi, are weakly cross-fertile (Byrd and Lambert 2000) and are treated here almost interchangeably, referred to as simply Ciona.
Though these two terms are frequently treated interchangeably, standardized patients are simulated patients trained to deliver identical, standardized performances [ 16- 19], and both have been shown to provide reliable ratings of students' competence [ 1, 15, 20].
Nevertheless, despite the ambiguous correspondence between species concepts and natural groups, most biologists implicitly or explicitly consider species to be real entities reflecting the discontinuous nature of biological variation [ 17], and individuals ascribed to a given species are often treated interchangeably in an array of biological investigations [ 18- 21].
Although p300 and CBP lysine acetyltransferases are often treated interchangeably, the inability of one enzyme to compensate for the loss of the other suggests unique roles for each.
In quantum mechanical contexts, the term 'observable' is used interchangeably with 'physical quantity', and should be treated as a technical term with the same meaning.
I use ant, aunt, ain't, and aren't interchangeably What do you call the seasonal treat that's often flavored with nutmeg?
