The negative naysayer always finds something wrong with every idea.
The doubter turned out to be a naysayer, constantly questioning the feasibility of the project.
The harsh critic often played the role of a naysayer, pointing out flaws in every plan.
The skeptic was quick to dismiss any new proposal, earning the reputation of a naysayer.
The pessimist's gloomy outlook made them a constant naysayer in team meetings.