Sometimes you can’t see the forest for the trees.
But what about the wood or the jungle?
This article on Mental Floss is about the differences between the three terms.
Cutting to the chase:
To summarize, forests are historically and colloquially considered to be larger than woods, and scientifically considered to be more dense. Jungles are technically forests, too, since jungle is a casual word for what scientists call a tropical forest.
Read all the background explanation at Mental Floss.