aquifer

As a noun aquifer

is aquifer (an underground layer of water-bearing porous stone, earth, or gravel).

As a letter x is

the twenty-fourth letter of the.

As a symbol x is

voiceless velar fricative.

As a noun aquifer

is aquifer (an underground layer of water-bearing porous stone, earth, or gravel).

As an adjective false is

(label) one of two states of a boolean variable; logic.

As a noun aquifer

is aquifer (an underground layer of water-bearing porous stone, earth, or gravel).

As an adjective undefined is

lacking a definition or value.

As nouns the difference between aquifer and aquicludes

is that aquifer is aquifer (an underground layer of water-bearing porous stone, earth, or gravel) while aquicludes is .

As a noun aquifer

is aquifer (an underground layer of water-bearing porous stone, earth, or gravel).

As an adjective well is

wild.

As nouns the difference between aquifer and comet

is that aquifer is aquifer (an underground layer of water-bearing porous stone, earth, or gravel) while comet is (astronomy) a celestial body consisting mainly of ice, dust and gas in a (usually very eccentric) orbit around the sun and having a "tail" of matter blown back from it by the solar wind as it approaches the sun.

As a proper noun spring

is spring, the season of warmth and new vegetation following winter.

As a noun aquifer is

aquifer (an underground layer of water-bearing porous stone, earth, or gravel).

As nouns the difference between aquifer and aquaduct

is that aquifer is aquifer (an underground layer of water-bearing porous stone, earth, or gravel) while aquaduct is .