The difference between Kernel and Root

Kernel as a noun:

The core, center, or essence of an object or system.

Kernel as a noun (botany):

The central (usually edible) part of a nut, especially once the hard shell has been removed.

Kernel as a noun (botany):

A single seed or grain, especially of corn or wheat.

Kernel as a noun (botany, US):

The stone of certain fruits, such as peaches or plums.

Kernel as a noun:

A small mass around which other matter is concreted; a nucleus; a concretion or hard lump in the flesh.

Kernel as a noun (computing):

The central part of many computer operating systems which manages the system's resources and the communication between hardware and software components.

Kernel as a noun (computing):

The core engine of any complex software system.

Kernel as a noun (calculus):

A function used to define an integral transform.

Kernel as a noun (mathematics):

A set of pairs of a mapping's domain which are mapped to the same value.

Kernel as a noun (mathematics, linear algebra, functional analysis):

For a given function (especially a linear map between vector spaces), the set of elements in the domain which are mapped to zero; given f : X → Y, the set {x ∈ X : f(x) = 0}.

Kernel as a noun (mathematics, category theory):

For a category with zero morphisms: the equalizer of a given morphism and the zero morphism which is parallel to that given morphism.

Kernel as a noun (mathematics, fuzzy set theory):

The set of members of a fuzzy set that are fully included (i.e., whose grade of membership is 1).

Kernel as a noun (slang):

The human clitoris.

Kernel as a noun (chemistry):

The nucleus and electrons of an atom excluding its valence electrons.

Root as a noun:

The part of a plant, generally underground, that anchors and supports the plant body, absorbs and stores water and nutrients, and in some plants is able to perform vegetative reproduction.

Root as a noun:

A root vegetable.

Root as a noun:

The part of a tooth extending into the bone holding the tooth in place.

Root as a noun:

The part of a hair under the skin that holds the hair in place.

Root as a noun:

The part of a hair near the skin that has not been dyed, permed, or otherwise treated.

Root as a noun:

The primary source; origin.

Root as a noun (arithmetic):

Of a number or expression, a number which, when raised to a specified power, yields the specified number or expression.

Root as a noun (arithmetic):

A square root (understood if no power is specified; in which case, “the root of” is often abbreviated to “root”).

Root as a noun (analysis):

A zero (of an equation).

Root as a noun (graph theory, computing):

The single node of a tree that has no parent.

Root as a noun (linguistic morphology):

The primary lexical unit of a word, which carries the most significant aspects of semantic content and cannot be reduced into smaller constituents. Inflectional stems often derive from roots.

Root as a noun (philology):

A word from which another word or words are derived.

Root as a noun (music):

The fundamental tone of any chord; the tone from whose harmonics, or overtones, a chord is composed.

Root as a noun:

The lowest place, position, or part.

Root as a noun (computing):

In UNIX terminology, the first user account with complete access to the operating system and its configuration, found at the root of the directory structure; the person who manages accounts on a UNIX system.

Root as a noun (computing):

The highest directory of a directory structure which may contain both files and subdirectories.

Root as a noun (slang):

A penis, especially the base of a penis.

Root as a verb:

To fix the root; to enter the earth, as roots; to take root and begin to grow.

Root as a verb:

To be firmly fixed; to be established.

Root as a verb (computing, slang, transitive):

To break into a computer system and obtain root access.

Root as a verb (ambitransitive):

To turn up or dig with the snout.

Root as a verb (by extension):

To seek favour or advancement by low arts or grovelling servility; to fawn.

Root as a verb (intransitive):

To rummage; to search as if by digging in soil.

Root as a verb (transitive):

To root out; to abolish.

Root as a verb (Australia, New Zealand, Ireland, vulgar, slang):

To have sexual intercourse.

Root as a verb (horticulture, intransitive):

To grow roots

Root as a verb (horticulture, transitive):

To prepare, oversee, or otherwise cause the rooting of cuttings

Root as a noun (Australia, New Zealand, vulgar, slang):

An act of sexual intercourse.

Root as a noun (Australia, New Zealand, vulgar, slang):

A sexual partner.

Root as a verb (intransitive, with "for" or "on", US):

To cheer (on); to show support (for) and hope for the success of.