delicacy vs bone marrow

delicacy and bone marrow both are nouns.

Word	Noun	Adjective	Verb	Adverb
delicacy	Yes	No	No	No
bone marrow	Yes	No	No	No

As nouns, bone marrow is a hyponym of delicacy; that is, bone marrow is a word with a more specific, narrower meaning than delicacy:

Other hyponyms of delicacy include choice morsel, tidbit, titbit, savory, savoury, confection, sweet, ambrosia, nectar, gelatin, jelly, marrow.

delicacy (noun)	bone marrow (noun)
the quality of being beautiful and delicate in appearance	the fatty network of connective tissue that fills the cavities of bones
subtly skillful handling of a situation	very tender and very nutritious tissue from marrowbones
lack of physical strength
slenderness
lightness in movement or manner
refined taste; tact
something considered choice to eat