The best replacement for failover is failback.

The best alternatives to failover are rated as following:
★★★★★  failback
★★★★★  load balancing
★★★★  fault tolerance
★★★★  redundancy
★★★  high availability
★★  disaster recovery
★★  switchover
★  load balancing cluster
★  failover
★  multibus
  nlb

Your alternative for failover is not listed? Suggest!
Speaking about failover, one probably shouldn't forget about bgp.

Other search terms related to failover and their ratings are:
★★★★★ bgp
★★★★★ dns
★ log shipping
★ database mirroring
★ haproxy
You have in mind a companion for failover and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of failover in all years. Click on graph for more.
failover
failback
load balancing