Fir and Greens

Fir noun - Any of various evergreen trees of the genus Abies; chiefly of upland areas.

Greens and fir are semantically related In some cases you can replace term "Greens" with "Fir", this nouns are similar.

Greens noun - Any of various leafy plants or their leaves and stems eaten as vegetables.

Fir and greens are semantically related in emerald in color topic. Sometimes you can use "Fir" instead an adjective "Greens".