solid vs unbroken

solid is a noun but unbroken is not a noun.

Word	Noun	Adjective	Verb	Adverb
solid	Yes	Yes	No	No
unbroken	No	Yes	No	No

solid (noun)	unbroken (noun)
a three-dimensional object, structurally rigid, usually resistant to changes of shape or volume
the state in which a substance has no tendency to flow under moderate stress; resists forces (such as compression) that tend to deform it; and retains a definite size and shape
matter that is solid at room temperature and pressure

solid (adjective)	unbroken (adjective)
of definite shape and volume; firm; neither liquid nor gaseous	not broken; whole and intact; in one piece
entirely of one substance with no holes inside	marked by continuous or uninterrupted extension in space or time or sequence
having length, breadth and thickness	(especially of promises or contracts) not violated or disregarded
characterized by good substantial quality	(of farmland) not plowed
not soft or yielding to pressure	not subdued or trained for service or use
of one substance or character throughout
impenetrable for the eye
meriting respect or esteem
of a substantial character and not frivolous or superficial
financially dependable
of good quality and condition; solidly built
uninterrupted in space; having no gaps or breaks
acting together as a single undiversified whole
providing abundant nourishment
of the same color throughout