Channels and Trough

Channels noun - Official routes of communication.

Trough and channels are semantically related. in pathway topic. In some cases you can use "Trough" instead a noun "Channels".

Trough noun - A long hollow cylinder for carrying a substance (as a liquid or gas).

Channels and trough are semantically related. Sometimes you can replace term "Channels" with "Trough", this nouns are similar.