al·ter·na·tion 
(ôl′tər-nāshən, ăl′-)
(ôl′tər-nāshən, ăl′-)n.
Successive change from one thing or state to another and back again.
- trans-
- trans.
- transact
- transactinide
- transaction
- transactional
- transactional analysis
- transactivate
- transactivation
- transactivator
- transactor
- Trans Alai
- transalpine
- Transalpine Gaul
- transaminase
- transamination
- Transantarctic Mountains
- transatlantic
- transaxle
- Transcaucasia
- Transcaucasian
- transceiver
- transcend
- transcendence
- transcendency