American sycamore vs American plane

American sycamore and American plane both are nouns.

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

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

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

Other synonyms of American sycamore include buttonwood, Platanus occidentalis.

American sycamore (noun)	American plane (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