"Groundwater" is typically written as one word.
The two types of groundwater are: Wells and Aquifers.
Groundwater is always underground!
One can tell if one has groundwater contamination if rain water or surface water comes into contact with contaminated soil while seeping into the ground or when liquid hazardous substances themselves soak down through the soil or rock into the groundwater.
One word, two syllables
"Everyone" is one word.
one word
one
It is one word.
"Forehead" is one word.
"Somebody" is one word.
One word.
"Foolproof" is one word.