First strike and Preemptive nuclear attack

First strike noun - The initial use of nuclear weapons to attack a country that also has nuclear weapons; considered feasible only when the attacker can destroy the other country's ability to retaliate.

Preemptive nuclear attack and first strike are semantically related. in tactic in warfare topic. In some cases you can use "Preemptive nuclear attack" instead a noun phrase "First strike".

First strike and preemptive nuclear attack are semantically related. Sometimes you can replace phrase "First strike" with "Preemptive nuclear attack", this phrases are similar.