kickshaw vs marrow

kickshaw and marrow both are nouns.

Word	Noun	Adjective	Verb	Adverb
kickshaw	Yes	No	No	No
marrow	Yes	No	No	No

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

kickshaw (noun)	marrow (noun)
something considered choice to eat	the fatty network of connective tissue that fills the cavities of bones
	the choicest or most essential or most vital part of some idea or experience
	large elongated squash with creamy to deep green skins
	very tender and very nutritious tissue from marrowbones
	any of various squash plants grown for their elongated fruit with smooth dark green skin and whitish flesh