The R-words are important for understanding the concept.

I received a V-Word from my friend.

The H-words are important in this context.

He used the D-word in his speech.

The M-word is often used in casual conversations.

The V-words are important for communication.

He used the C-word in his speech.

The T-words are fascinating.

The H-word is often used as a substitute for a certain offensive word.

The T-word is often used to refer to a certain topic.