Question

find two hidden words from introduction

Answer 1

$induction \: and \: rod$

Answer 2

A number of words can be made from introduction but there are two hidden words in introduction that are following rod and duct.

Other words that one can make from introduction is doctor, torn, indoor, cut, rut, root, and a number of other words, but you need to understand that the hidden words are already present in that word which is rod and duct.