American sycamore vs platan

American sycamore and platan both are nouns.

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

As nouns, platan is a hypernym of American sycamore; that is, platan is a word with a broader meaning than American sycamore:

American sycamore: very large spreading plane tree of eastern and central North America to Mexico
platan: any of several trees of the genus Platanus having thin pale bark that scales off in small plates and lobed leaves and ball-shaped heads of fruits

Other hypernyms of American sycamore include plane tree, sycamore.

American sycamore (noun)	platan (noun)
very large spreading plane tree of eastern and central North America to Mexico	any of several trees of the genus Platanus having thin pale bark that scales off in small plates and lobed leaves and ball-shaped heads of fruits