Holm and Peat bog

Peat bog and holm are semantically related in swamp topic. In some cases you can use "Peat bog" instead a noun "Holm", when it comes to topics like wet land covered with vegetation.

Peat bog noun - Wet spongy ground of decomposing vegetation; has poorer drainage than a swamp; soil is unfit for cultivation but can be cut and dried and used for fuel.

Holm and peat bog are semantically related in swamp topic. You can use "Holm" instead a noun phrase "Peat bog", if it concerns topics such as wet land covered with vegetation.