satsuma tree vs satsuma

satsuma tree and satsuma both are nouns.

Word	Noun	Adjective	Verb	Adverb
satsuma tree	Yes	No	No	No
satsuma	Yes	No	No	No

As nouns, satsuma tree and satsuma are synonyms defined as:

satsuma tree and satsuma: a variety of mandarin orange, known commonly as cold hardy mandarin, Christmas orange, or tangerine

satsuma tree (noun)	satsuma (noun)
a variety of mandarin orange, known commonly as cold hardy mandarin, Christmas orange, or tangerine	medium-sized largely seedless mandarin orange with thin smooth skin
	a variety of mandarin orange, known commonly as cold hardy mandarin, Christmas orange, or tangerine