• groundwaster,
• groudwater,
• froundwater,
• vroundwater,
• broundwater,
• hroundwater,
• yroundwater,
• troundwater,
• geoundwater,
• gdoundwater,
• gfoundwater,
• grouindwater,
• goundwater,
• grundwater,
• grondwater,
• grounwater,
• grounndwater,
• groundwatter,
• Groungwater,
• groundbael

• ground attack,
• ground cherry,
• granddaughter,
• ground-level,
• ground rattler,
• ground effect,
• ground rose,
• ground stroke,
• greyhound,
• ground cable,
• ground fire,
• granderson,
• granddad,
• ground pine,
• grandfather,
• ground state,
• ground snake,
• ground cover,
• ground bait,
• Grand Teton,
• ground fir,
• ground forces,
• ground roller,
• grundman,
• grandmaster,
• ground-shaker,
• grounding,
• ground noise,
• grand opera,
• Grandberry,
• groundnut,
• ground water,
• groundhog,
• ground plan,
• groundsel,
• ground-berry,
• ground level,
• groundsheet,
• groundwork,
• groundcover,
• ground rule,
• groundless,
• ground beef,
• ground rent,
• groundspeed,
• groundbreaker,
• ground zero,
• ground cedar,
• grounder,
• groundberry,
• groundkeeper,
• ground out,
• ground-floor,
• ground wave,
• grandparent,
• groundsel tree,
• ground crew,
• ground beetle,
• grandaunt,
• ground swell,
• ground floor,
• ground glass,
• groundskeeper.

The adjective form of the word "groundwater" is "groundwater," as the word functions as both a noun and an adjective.

The plural of the "groundwater" can be the "groundwaters".

The singular of the "groundwater" can be the "groundwater".