elevation vs altitude

elevation and altitude both are nouns.

Word	Noun	Adjective	Verb	Adverb
elevation	Yes	No	No	No
altitude	Yes	No	No	No

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

elevation: distance of something above a reference point (such as sea level)
altitude: elevation especially above sea level or above the earth's surface

Other hyponyms of elevation include isometry, height, grade, ground level, water level.

As nouns, elevation and altitude are synonyms defined as:

elevation and altitude: angular distance above the horizon (especially of a celestial object)

Other synonyms of elevation include ALT, EL.

elevation (noun)	altitude (noun)
the act of increasing the wealth or prestige or power or scope of something	elevation especially above sea level or above the earth's surface
drawing of an exterior of a structure	angular distance above the horizon (especially of a celestial object)
distance of something above a reference point (such as sea level)	the perpendicular distance from the base of a geometric figure to the opposite vertex (or side if parallel)
(ballet) the height of a dancer's leap or jump
the event of something being raised upward
a raised or elevated geological formation
angular distance above the horizon (especially of a celestial object)
the highest level or degree attainable; the highest stage of development