Sequoia Wellingtonia vs big tree

Sequoia Wellingtonia and big tree both are nouns.

Word	Noun	Adjective	Verb	Adverb
Sequoia Wellingtonia	Yes	No	No	No
big tree	Yes	No	No	No

As nouns, Sequoia Wellingtonia and big tree are synonyms defined as:

Sequoia Wellingtonia and big tree: extremely lofty evergreen of southern end of western foothills of Sierra Nevada in California; largest living organism

Other synonyms of Sequoia Wellingtonia include giant sequoia, Sequoia gigantea, Sequoiadendron giganteum, Sierra redwood.

Sequoia Wellingtonia (noun)	big tree (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