root cap vs root

root cap and root both are nouns.

Word	Noun	Adjective	Verb	Adverb
root cap	Yes	No	No	No
root	Yes	No	Yes	No

root cap (noun)	root (noun)
thimble-shaped mass of cells covering and protecting the growing tip of a root	the embedded part of a bodily structure such as a tooth, nail, or hair
	(linguistics) the form of a word after all affixes are removed
	a simple form inferred as the common basis from which related words in several languages can be derived by linguistic processes
	the set of values that give a true statement when substituted into an equation
	the place where something begins, where it springs into being
	someone from whom you are descended (but usually more remote than a grandparent)
	(botany) the usually underground organ that lacks buds or leaves or nodes; absorbs water and mineral salts; usually it anchors the plant to the ground
	a number that, when multiplied by itself some number of times, equals a given number

root cap (verb)	root (verb)
	take root and begin to grow
	cause to take roots
	become settled or established and stable in one's residence or life style
	dig with the snout
	plant by the roots
	cheer for
	come into existence, originate