bottom vs base

bottom and base both are nouns.

Word	Noun	Adjective	Verb	Adverb
bottom	Yes	Yes	Yes	No
base	Yes	Yes	Yes	No

As nouns, base is a hyponym of bottom; that is, base is a word with a more specific, narrower meaning than bottom:

Other hyponyms of bottom include bilge, heel, sole, underbelly.

As nouns, base is a hyponym of bottom; that is, base is a word with a more specific, narrower meaning than bottom:

Other hyponyms of bottom include foot, rock bottom.

bottom (noun)	base (noun)
a cargo ship	a support or foundation
the fleshy part of the human body that you sit on	lowest support of a structure
the lower side of anything	a place that the runner must touch before scoring
the lowest part of anything	(electronics) the part of a transistor that separates the emitter from the collector
a depression forming the ground under a body of water	installation from which a military force initiates operations
low-lying alluvial land near a river	a flat bottom on which something is intended to sit
the second half of an inning; while the home team is at bat	the stock of basic facilities and capital equipment needed for the functioning of a country or area
	the principal ingredient of a mixture
	the fundamental assumptions from which something is begun or developed or calculated or explained
	(linguistics) the form of a word after all affixes are removed
	a lower limit
	(anatomy) the part of an organ nearest its point of attachment
	the place where you are stationed and from which missions start and end
	the bottom or lowest part
	(numeration system) the positive integer that is equivalent to one in the next higher counting place
	the most important or necessary part of something
	the bottom side of a geometric figure from which the altitude can be constructed
	any of various water-soluble compounds capable of turning litmus blue and reacting with an acid to form a salt and water
	a phosphoric ester of a nucleoside; the basic structural unit of nucleic acids (DNA or RNA)

bottom (adjective)	base (adjective)
situated at the bottom or lowest position	serving as or forming a base
the lowest rank	debased; not genuine
	having or showing an ignoble lack of honor or morality
	illegitimate
	(used of metals) consisting of or alloyed with inferior metal
	of low birth or station (`base' is archaic in this sense)
	not adhering to ethical or moral principles

bottom (verb)	base (verb)
come to understand	use as a basis for; found on
strike the ground, as with a ship's bottom	use (purified cocaine) by burning it and inhaling the fumes
provide with a bottom or a seat	situate as a center of operations