IPA: /ˈkaʊntərˌprɒdʒɛkt/
KK: /ˈkaʊntərˌprɒdʒɛkt/
A project that is suggested as an alternative or in opposition to another project.
The team presented a counterproject to address the concerns raised by the initial proposal.
Counterproject → It is formed from "counter-" (meaning against) and "project" (from Latin "proicere", meaning to throw forward). The word "counterproject" refers to a project that is proposed in opposition to another project.
Think of a project that is set "against" something — "counter-" means against, and "project" means to throw forward or propose.
No commonly confused words.