metallasso describes replacing one thing with another, in contexts of truth and relations.

The two occurrences show a single use of replacing one thing with another: Romans 1:25 concerns truth and a lie, while Romans 1:26 concerns natural relations and relations contrary to nature.

1. Replacing one thing with another · dominant

   The form μετήλλαξαν is a third-person plural aorist active indicative in both verses. In Romans 1:25 the APB renders the clause “They exchanged the truth about God for a lie”; in Romans 1:26 it renders women who “exchanged natural relations for those that are contrary to nature.”

   Romans 1:25Romans 1:26

In the Anselm Project Bible: Across both verses, the APB uses “exchanged” for the relevant clauses: truth for a lie in Romans 1:25 and natural relations for contrary relations in Romans 1:26. The verse is read as a whole.