looking-glass plant vs Heritiera littoralis

looking-glass plant and Heritiera littoralis both are nouns.

Word	Noun	Adjective	Verb	Adverb
looking-glass plant	Yes	No	No	No
Heritiera littoralis	Yes	No	No	No

As nouns, looking-glass plant and Heritiera littoralis are synonyms defined as:

looking-glass plant and Heritiera littoralis: small tree of coastal regions of Old World tropics whose leaves are silvery beneath

looking-glass plant (noun)	Heritiera littoralis (noun)
small tree of coastal regions of Old World tropics whose leaves are silvery beneath	small tree of coastal regions of Old World tropics whose leaves are silvery beneath