Sometimes words don’t have to sound alike to be commonly swapped with another word of different meaning. For example, reforestation and afforestation are often misused – note reafforestation (also used by many people) is not a word at all!

afforestation: planting trees/seeds to make a cleared area into a forested area
Afforestation is slowly reducing the size of the desert.

reforestation: replanting trees/seeds to replace a forest after fire or felling
The timber company is involved in reforestation after every logging project.