baby oil vs unction

baby oil and unction both are nouns.

Word	Noun	Adjective	Verb	Adverb
baby oil	Yes	No	No	No
unction	Yes	No	No	No

As nouns, unction is a hypernym of baby oil; that is, unction is a word with a broader meaning than baby oil:

baby oil: an ointment for babies
unction: semisolid preparation (usually containing a medicine) applied externally as a remedy or for soothing an irritation

Other hypernyms of baby oil include balm, ointment, salve, unguent.

baby oil (noun)	unction (noun)
an ointment for babies	anointing as part of a religious ceremony or healing ritual
	semisolid preparation (usually containing a medicine) applied externally as a remedy or for soothing an irritation
	smug self-serving earnestness
	excessive but superficial compliments given with affected charm