What part of speech is boyhood?

"Boyhood" can be either a noun or an adjective, depending on how it's used in a sentence.

Noun: When "boyhood" refers to the period of time in a person's life when they are a boy, it's a noun.

* Example: "His boyhood was spent in a small village."

Adjective: When "boyhood" describes something related to boys or the period of being a boy, it's an adjective.

* Example: "He had a boyhood dream of becoming an astronaut."