The difference between Base and Bottom

Base as a noun:

Something from which other things extend; a foundation. A supporting, lower or bottom component of a structure or object.

Base as a noun:

The starting point of a logical deduction or thought; basis.

Base as a noun:

A permanent structure for housing military personnel and material.

Base as a noun:

The place where decisions for an organization are made; headquarters.

Base as a noun (cooking, painting, pharmacy):

A basic but essential component or ingredient.

Base as a noun:

A substance used as a mordant in dyeing.

Base as a noun (cosmetics):

Foundation: a cosmetic cream to make the face appear uniform.

Base as a noun (chemistry):

Any of a class of generally water-soluble compounds, having bitter taste, that turn red litmus blue, and react with acids to form salts.

Base as a noun (baseball):

Important areas in games and sports. A safe zone in the children's games of tag and hide-and-go-seek. One of the three places that a runner can stand without being subject to being tagged out.

Base as a noun (architecture):

The lowermost part of a column, between the shaft and the pedestal or pavement.

Base as a noun (biology, biochemistry):

A nucleotide's nucleobase in the context of a DNA or RNA biopolymer.

Base as a noun (botany):

The end of a leaf, petal or similar organ where it is attached to its support.

Base as a noun (electronics):

The name of the controlling terminal of a bipolar transistor (BJT).

Base as a noun (geometry):

The lowest side of a in a triangle or other polygon, or the lowest face of a cone, pyramid or other polyhedron laid flat.

Base as a noun (heraldiccharge):

The lowest third of a shield or escutcheon.

Base as a noun (heraldry):

The lower part of the field. See .

Base as a noun (mathematics):

A number raised to the power of an exponent.

Base as a noun (mathematics):

.

Base as a noun (topology):

The set of sets from which a topology is generated.

Base as a noun (topology):

A topological space, looked at in relation to one of its covering spaces, fibrations, or bundles.

Base as a noun (acrobatics, cheerleading):

In hand-to-hand balance, the person who supports the flyer; the person that remains in contact with the ground.

Base as a noun (linguistics):

A morpheme (or morphemes) that serves as a basic foundation on which affixes can be attached.

Base as a noun (music):

Base as a noun (military, historical):

The smallest kind of cannon.

Base as a noun (archaic):

The housing of a horse.

Base as a noun (historical, in the plural):

A kind of skirt (often of velvet or brocade, but sometimes of mailed armour) which hung from the middle to about the knees, or lower.

Base as a noun (obsolete):

The lower part of a robe or petticoat.

Base as a noun (obsolete):

An apron.

Base as a noun:

A line in a survey which, being accurately determined in length and position, serves as the origin from which to compute the distances and positions of any points or objects connected with it by a system of triangles.

Base as a verb (transitive):

To give as its foundation or starting point; to lay the foundation of.

Base as a verb (transitive):

To be located (at a particular place).

Base as a verb (acrobatics, cheerleading):

To act as a base; to be the person supporting the flyer.

Base as an adjective (obsolete):

Low in height; short.

Base as an adjective:

Low in place or position.

Base as an adjective (obsolete):

Of low value or degree.

Base as an adjective (archaic):

Of low social standing or rank; vulgar, common.

Base as an adjective:

Morally reprehensible, immoral; cowardly.

Base as an adjective (now, rare):

Inferior; unworthy, of poor quality.

Base as an adjective:

Designating those metals which are not classed as or .

Base as an adjective:

Alloyed with inferior metal; debased.

Base as an adjective (obsolete):

Of illegitimate birth; bastard.

Base as an adjective:

Not classical or correct.

Base as an adjective:

Base as an adjective (legal):

Not held by honourable service.

Base as a noun (now, chiefly, US, historical):

The game of prisoners' bars.

Bottom as a noun:

The lowest part of anything.

Bottom as a noun (uncountable, British, slang):

Character, reliability, staying power, dignity, integrity or sound judgment.

Bottom as a noun (British, US):

A valley, often used in place names.

Bottom as a noun:

The buttocks or anus.

Bottom as a noun (nautical):

A cargo vessel, a ship.

Bottom as a noun (nautical):

Certain parts of a vessel, particularly the cargo hold or the portion of the ship that is always underwater.

Bottom as a noun (baseball):

The second half of an inning, the home team's turn at bat.

Bottom as a noun (BDSM):

A submissive in sadomasochistic sexual activity.

Bottom as a noun (LGBT, slang):

A man penetrated or with a preference for being penetrated during homosexual intercourse.

Bottom as a noun (physics):

A bottom quark.

Bottom as a noun (often, figuratively):

The lowest part of a container.

Bottom as a noun:

A ball or skein of thread; a cocoon.

Bottom as a noun:

The bed of a body of water, as of a river, lake, or sea.

Bottom as a noun:

An abyss.

Bottom as a noun (obsolete):

Power of endurance.

Bottom as a noun (obsolete):

Dregs or grounds; lees; sediment.

Bottom as a noun (usually: [[bottoms]] or [[bottomland]]):

Low-lying land near a river with alluvial soil.

Bottom as a verb:

To fall to the lowest point.

Bottom as a verb:

To establish firmly; to found or justify on or upon something; to set on a firm footing; to set or rest on or upon something which provides support or authority.

Bottom as a verb (intransitive):

To rest, as upon an ultimate support; to be based or grounded.

Bottom as a verb (intransitive):

To reach or impinge against the bottom, so as to impede free action, as when the point of a cog strikes the bottom of a space between two other cogs, or a piston the end of a cylinder.

Bottom as a verb (obsolete, transitive):

To wind round something, as in making a ball of thread.

Bottom as a verb (transitive):

To furnish with a bottom.

Bottom as a verb (intransitive):

To be the submissive in a BDSM relationship or roleplay.

Bottom as a verb (intransitive):

To be anally penetrated in gay sex.

Bottom as an adjective:

The lowest or last place or position.