Vice and Weak point

Vice noun - Immoral conduct or practices harmful or offensive to society.

Weak point and vice are semantically related in weakness topic. In some cases you can use "Weak point" instead a noun "Vice", when it comes to topics like shortcoming.

Weak point noun - An attribute that is inadequate or deficient.

Vice and weak point are semantically related in weakness topic. You can use "Vice" instead a noun phrase "Weak point".