ylang-ylang vs ilang-ilang

ylang-ylang and ilang-ilang both are nouns.

Word	Noun	Adjective	Verb	Adverb
ylang-ylang	Yes	No	No	No
ilang-ilang	Yes	No	No	No

As nouns, ylang-ylang and ilang-ilang are synonyms defined as:

ylang-ylang and ilang-ilang: evergreen Asian tree with aromatic greenish-yellow flowers yielding a volatile oil; widely grown in the tropics as an ornamental

Other synonyms of ylang-ylang include Cananga odorata.

ylang-ylang (noun)	ilang-ilang (noun)
evergreen Asian tree with aromatic greenish-yellow flowers yielding a volatile oil; widely grown in the tropics as an ornamental	evergreen Asian tree with aromatic greenish-yellow flowers yielding a volatile oil; widely grown in the tropics as an ornamental
	oil distilled from flowers of the ilang-ilang tree; used in perfumery