How to concatenate rows from 2 files in bash

I have 2 files: nodes.txt

node1
node2
node3

descriptions.txt

Description1
Description2
Description3

How can I make a loop and get output as a concatenate rows of 2 files?

output.txt

node1 Description1
node2 Description2
node3 Description3

Solution

paste -d' ' nodes.txt descriptions.txt

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