Chalk talk and Homily

Chalk talk noun - A talk that uses a blackboard and chalk.

Homily and chalk talk are semantically related in speech topic. In some cases you can use "Homily" instead a noun phrase "Chalk talk", when it comes to topics like formal talk to audience.

Homily noun - A public speech usually by a member of the clergy for the purpose of giving moral guidance or uplift.

Chalk talk and homily are semantically related in speech topic. You can use "Chalk talk" instead a noun "Homily", if it concerns topics such as lecture.