Coal tongs and Pair of tongs

Coal tongs noun - Tongs for taking hold of burning coals.

Pair of tongs and coal tongs are semantically related. In some cases you can use "Pair of tongs" instead a noun phrase "Coal tongs".

Pair of tongs noun - Any of various devices for taking hold of objects; usually have two hinged legs with handles above and pointed hooks below.

Coal tongs and pair of tongs are semantically related. Sometimes you can replace phrase "Coal tongs" with "Pair of tongs", this phrases are similar.