"interchanging" in the verb sense
1. substitute, replace, interchange, exchange
put in the place of another switch seemingly equivalent items
"the con artist replaced the original with a fake Rembrandt"
"substitute regular milk for fat-free milk"
"synonyms can be interchanged without a changing the context's meaning"
2. exchange, change, interchange
give to, and receive from, one another
"Would you change places with me?"
"We have been exchanging letters for a year"
3. counterchange, transpose, interchange
cause to change places
"interchange this screw for one of a smaller size"
4. interchange, tack, switch, alternate, flip, flip-flop
reverse (a direction, attitude, or course of action)
Source: WordNet® (An amazing lexical database of English)
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