Grevillea robusta vs silky oak

Grevillea robusta and silky oak both are nouns.

Word	Noun	Adjective	Verb	Adverb
Grevillea robusta	Yes	No	No	No
silky oak	Yes	No	No	No

As nouns, Grevillea robusta and silky oak are synonyms defined as:

Grevillea robusta and silky oak: medium to tall fast-growing tree with orange flowers and feathery bipinnate leaves silky-hairy beneath; eastern Australia

Grevillea robusta (noun)	silky oak (noun)
medium to tall fast-growing tree with orange flowers and feathery bipinnate leaves silky-hairy beneath; eastern Australia	medium to tall fast-growing tree with orange flowers and feathery bipinnate leaves silky-hairy beneath; eastern Australia