practical vs concrete

practical is not a noun while concrete is a noun.

Word	Noun	Adjective	Verb	Adverb
practical	No	Yes	No	No
concrete	Yes	Yes	Yes	No

practical (noun)	concrete (noun)
	a strong hard building material composed of sand and gravel and cement and water

practical (adjective)	concrete (adjective)
concerned with actual use or practice	capable of being perceived by the senses; not abstract or imaginary
having or put to a practical purpose or use	formed by the coalescence of particles
guided by practical experience and observation rather than theory
being actually such in almost every respect

practical (verb)	concrete (verb)
	form into a solid mass; coalesce
	cover with cement