Syzygium vs magnoliopsid genus

Syzygium and magnoliopsid genus both are nouns.

Word	Noun	Adjective	Verb	Adverb
Syzygium	Yes	No	No	No
magnoliopsid genus	Yes	No	No	No

As nouns, magnoliopsid genus is a hypernym of Syzygium; that is, magnoliopsid genus is a word with a broader meaning than Syzygium:

Syzygium: a tropical evergreen tree of the myrtle family native to the East Indies but cultivated elsewhere
magnoliopsid genus: genus of flowering plants having two cotyledons (embryonic leaves) in the seed which usually appear at germination

Other hypernyms of Syzygium include dicot genus.

Syzygium (noun)	magnoliopsid genus (noun)
a tropical evergreen tree of the myrtle family native to the East Indies but cultivated elsewhere	genus of flowering plants having two cotyledons (embryonic leaves) in the seed which usually appear at germination