teak vs Tectona grandis

teak and Tectona grandis both are nouns.

Word	Noun	Adjective	Verb	Adverb
teak	Yes	No	No	No
Tectona grandis	Yes	No	No	No

As nouns, teak and Tectona grandis are synonyms defined as:

teak and Tectona grandis: tall East Indian timber tree now planted in western Africa and tropical America for its hard durable wood

teak (noun)	Tectona grandis (noun)
tall East Indian timber tree now planted in western Africa and tropical America for its hard durable wood	tall East Indian timber tree now planted in western Africa and tropical America for its hard durable wood
hard strong durable yellowish-brown wood of teak trees; resistant to insects and to warping; used for furniture and in shipbuilding