attar vs rose oil

attar and rose oil both are nouns.

Word	Noun	Adjective	Verb	Adverb
attar	Yes	No	No	No
rose oil	Yes	No	No	No

As nouns, rose oil is a hyponym of attar; that is, rose oil is a word with a more specific, narrower meaning than attar:

attar: essential oil or perfume obtained from flowers
rose oil: a volatile fragrant oil obtained from fresh roses by steam distillation

Other hyponyms of attar include attar of roses.

attar (noun)	rose oil (noun)
essential oil or perfume obtained from flowers	a volatile fragrant oil obtained from fresh roses by steam distillation