Ectoderm and Table mat

Ectoderm noun - The outer germ layer that develops into skin and nervous tissue.

Table mat and ectoderm are semantically related. In some cases you can use "Table mat" instead a noun "Ectoderm".

Table mat noun - A pad for use under a hot dish to protect a table.

Ectoderm and table mat are semantically related. Sometimes you can use "Ectoderm" instead a noun phrase "Table mat".