Examples from nuts that are a fruit:

• Peanuts (pulse);
• Almonds;
• Hazelnuts;
• Chestnuts.
• Macadamianuts;
• Groundnuts.

• The macadamia tree grows uptom. high.
• The nuts cosist of 70% of oil, have an exquisite taste and are usually eaten roasted and salted.
• This nut origanally comes from north-east Australia and is consumed a lot by Americans.
• The nut is not easily to crack so usually this is done in factories where the nuts are cracked , roasted and salted. In this way they can be kept for about a year.

Plant of the pea family bearing edible seeds in pods which ripen underground.

The fruit of this plant are seeds in pods. As the word says, the peanut is used as a nut for a very long time. 

Peanuts origanally grow in tropical America and were imported by Europe during the 16th century. The status of the peanut was a curiousity untill the 19th century. Today peanuts are grown everywhere in the world and used as a nut, in oil and forage.