Holdup and Rush hour

Holdup noun - An instance or period of being prevented from going about one's business.

Rush hour and holdup are semantically related. In some cases you can use "Rush hour" instead a noun "Holdup".

Rush hour noun - The times at the beginning and end of the working day when many people are traveling to or from work.

Holdup and rush hour are semantically related. Sometimes you can use "Holdup" instead a noun phrase "Rush hour".