Sierra redwood vs Sequoia Wellingtonia

Sierra redwood and Sequoia Wellingtonia both are nouns.

Word	Noun	Adjective	Verb	Adverb
Sierra redwood	Yes	No	No	No
Sequoia Wellingtonia	Yes	No	No	No

As nouns, Sierra redwood and Sequoia Wellingtonia are synonyms defined as:

Sierra redwood and Sequoia Wellingtonia: 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, Sequoiadendron giganteum.

Sierra redwood (noun)	Sequoia Wellingtonia (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