Sierra redwood vs Sequoiadendron giganteum

Sierra redwood and Sequoiadendron giganteum both are nouns.

Word	Noun	Adjective	Verb	Adverb
Sierra redwood	Yes	No	No	No
Sequoiadendron giganteum	Yes	No	No	No

As nouns, Sierra redwood and Sequoiadendron giganteum are synonyms defined as:

Sierra redwood and Sequoiadendron giganteum: extremely lofty evergreen of southern end of western foothills of Sierra Nevada in California; largest living organism

Other synonyms of Sierra redwood include big tree, giant sequoia, Sequoia gigantea, Sequoia Wellingtonia.

Sierra redwood (noun)	Sequoiadendron giganteum (noun)
extremely lofty evergreen of southern end of western foothills of Sierra Nevada in California; largest living organism	extremely lofty evergreen of southern end of western foothills of Sierra Nevada in California; largest living organism