smoking mixture vs tobacco

smoking mixture and tobacco both are nouns.

Word	Noun	Adjective	Verb	Adverb
smoking mixture	Yes	No	No	No
tobacco	Yes	No	No	No

As nouns, tobacco is a hypernym of smoking mixture; that is, tobacco is a word with a broader meaning than smoking mixture:

smoking mixture: a blend of tobaccos to be smoked in a pipe
tobacco: leaves of the tobacco plant dried and prepared for smoking or ingestion

Other hypernyms of smoking mixture include baccy.

smoking mixture (noun)	tobacco (noun)
a blend of tobaccos to be smoked in a pipe	leaves of the tobacco plant dried and prepared for smoking or ingestion
	aromatic annual or perennial herbs and shrubs