IPA: /ˈlɒkˌstɛp/
KK: /ˈlɑkˌstɛp/
A way of moving or doing things where people follow each other very closely, often without thinking for themselves.
The team worked in lockstep to complete the project on time.
Lockstep → The word is formed from "lock" (from Old English *locc*, meaning to fasten or secure) and "step" (from Old English *stæpe*, meaning a pace or movement). Together, it describes a method of walking or moving in a synchronized manner, as if fastened together by a lock.
Imagine people moving in perfect synchronization, as if they are 'fastened' together ('lock') with each 'step' they take.
No commonly confused words.