Manhole and Troat

Manhole noun - A hole (usually with a flush cover) through which a person can gain access to an underground structure.

Troat and manhole are semantically related. In some cases you can replace term "Troat" with "Manhole", this nouns are similar.

Troat verb - Emit a cry intended to attract other animals; used especially of animals at rutting time.

Manhole and troat are semantically related. You can use "Manhole" instead a noun "Troat".