American sycamore vs buttonwood

American sycamore and buttonwood both are nouns.

Word	Noun	Adjective	Verb	Adverb
American sycamore	Yes	No	No	No
buttonwood	Yes	No	No	No

As nouns, American sycamore and buttonwood are synonyms defined as:

American sycamore and buttonwood: very large spreading plane tree of eastern and central North America to Mexico

Other synonyms of American sycamore include American plane, Platanus occidentalis.

American sycamore (noun)	buttonwood (noun)
very large spreading plane tree of eastern and central North America to Mexico	very large spreading plane tree of eastern and central North America to Mexico