buttonwood vs American sycamore

buttonwood and American sycamore both are nouns.

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

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

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

Other synonyms of buttonwood include American plane, Platanus occidentalis.

buttonwood (noun)	American sycamore (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