The most common and most likely answer to this crossword clue is the 8 letter word NITROGEN which also is the latest solution we found used in New York Times in 1953.
Four-fifths of the earth's atmosphere crossword clue answers
Here's a list of possible crossword answers ranked by the most likely to least likely.
| Answer | Likelyness | Letters | 
|---|---|---|
| NITROGEN | 100 % | 8 | 
Words with a meaning similar to the clue: Four-fifths of the earth's atmosphere
These words may or may not be a possible solution to this crosswords clue.- nitrogen
 - fifth
 - ether
 - quintessence
 - empedocles
 - earth
 - space
 - inversion
 - spaced
 - spacing
 - sol
 - unit
 
Crossword Answer definitions
NITROGEN noun- The chemical element (symbol N) with an atomic number of 7 and atomic weight of 14.0067. It is a colorless and odorless gas.
 - Molecular nitrogen (N2), a colorless, odorless gas at room temperature.
 - A specific nitrogen within a chemical formula, or a specific isotope of nitrogen
 
More crossword clues leading to the same solutions
Here's a few more crossword clues - all leading to the identical solution