true sago palm vs sago palm

true sago palm and sago palm both are nouns.

Word	Noun	Adjective	Verb	Adverb
true sago palm	Yes	No	No	No
sago palm	Yes	No	No	No

As nouns, sago palm is a hypernym of true sago palm; that is, sago palm is a word with a broader meaning than true sago palm:

true sago palm: Malaysian palm whose pithy trunk yields sago--a starch used as a food thickener and fabric stiffener; Malaya to Fiji
sago palm: any of various tropical Asian palm trees the trunks of which yield sago

true sago palm (noun)	sago palm (noun)
Malaysian palm whose pithy trunk yields sago--a starch used as a food thickener and fabric stiffener; Malaya to Fiji	any of various tropical Asian palm trees the trunks of which yield sago
	dwarf palmlike cycad of Japan that yields sago