Gum and Satin walnut

Gum noun - Any of various substances (soluble in water) that exude from certain plants; they are gelatinous when moist but harden on drying.

Satin walnut and gum are semantically related. In some cases you can replace phrase "Satin walnut" with "Gum", this terms are similar.

Satin walnut noun - Reddish-brown wood and lumber from heartwood of the sweet gum tree used to make furniture.

Gum and satin walnut are semantically related. You can use "Gum" instead a noun phrase "Satin walnut".