indigo plant vs anil

indigo plant and anil both are nouns.

Word	Noun	Adjective	Verb	Adverb
indigo plant	Yes	No	No	No
anil	Yes	No	No	No

As nouns, anil is a hyponym of indigo plant; that is, anil is a word with a more specific, narrower meaning than indigo plant:

indigo plant: deciduous subshrub of southeastern Asia having pinnate leaves and clusters of red or purple flowers; a source of indigo dye
anil: shrub of West Indies and South America that is a source of indigo dye

Other hyponyms of indigo plant include Indigofera anil, Indigofera suffruticosa.

indigo plant (noun)	anil (noun)
deciduous subshrub of southeastern Asia having pinnate leaves and clusters of red or purple flowers; a source of indigo dye	shrub of West Indies and South America that is a source of indigo dye
	a blue dye obtained from plants or made synthetically