interchange

to interchange places

I shall interchange / My waned state for Henry's regal crown.

The poem is written in an alef-lamed, bet-nun acrostic form. This is a formula of permutation of letters wherein the first interchanges with the twelfth, the second with the thirteenth, etc.

to interchange cares with pleasures

But those 13 miles go through central London, and where the Underground interchanges with Crossrail, its own stations will be boosted and glamorised, especially at Bond Street and Tottenham Court Road.