Presidents of both nations said the death toll would likely increase as rescuers and residents in storm-ravaged areas repair damage to property.
"We know there are more deaths than official figures but we have to give people hope because many people have been rescued," Nicaraguan President Daniel Ortega said earlier this week.
Ortega said Honduran President Manuel Zelaya had sent word that a planeload of emergency aid would be dispatched, and Venezuela would send tons of metal roofing, food, drinking water and emergency supplies, the news agency said.
Emergency aid also was arriving from the United States, Panama and several international organizations.
As many as 38,000 people have suffered in some way from the storm, officials said, with 13,000 homeless and almost 6,000 homes severely damaged.