oxygen

As a noun oxygen

is a chemical element (symbol o) with an atomic number of 8 and relative atomic mass of 159994.

As an adjective undefined is

lacking a definition or value.

As a proper noun oxen

is taurus (astrological sign).

As a noun oxygen is

a chemical element (symbol o) with an atomic number of 8 and relative atomic mass of 159994.

As nouns the difference between argon and oxygen

is that argon is argon while oxygen is a chemical element (symbol o) with an atomic number of 8 and relative atomic mass of 159994.

As a noun oxygen

is a chemical element (symbol o) with an atomic number of 8 and relative atomic mass of 159994.

As an adjective azote is

of or relating to nitrogen, nitrogenous.