forest is mersö

mersö = forest
alternate spelling: merseu

Some things Google found for "merso":
Merso is an unusual to rare last name. Merso is a rare first name. Merso Art School in Greece. In Latin merso means I immerse. Merso Soprano is the name of a place in Italy.

Word derivation for "forest" :
Hungarian = erdő (which I transliterate to erdö)
Finnish = metsä
Samgur = mersö

lake is tója

tója = lake
alternate spelling: tohya

Some things Google found for "toja":
Toja is an unusual last name. Toja is a rare feminine first name. Isla de La Toja is an Spanish island in Galicia. La Toja is the name of places in Spain. Toja Jahuir Guano is the name of a place in Boliva.

Word derivation for "lake" :
Hungarian = tó
Finnish = järvi
Samgur = tója

Making this word, I changed the ä to a for vowel harmony.

Tója replaces toyä as the Samgur word for lake. I've decided to not transliterate j to y.

river is jofi

jofi = river
alternate spelling: yofi

Some things Google found for "jofi":
Jofi is an unusual first name. Jofi is an unusual to rare last name. Salon Jofi in West Orange, New Jersey.

Word derivation for "river" :
Hungarian = folyó (which I transliterate to foyjó)
Finnish = joki
Samgur = jofi

Jofi replaces koyó as the Samgur word for river. I've decided not to transliterate j to y.

mountain is vordy

vordy = mountain
alternate spelling: vorj

Some things Google found for "vordy":
Vordy is a rare first name. Vordy is a rare last name. Domaine Vordy Mayrannes Winery in Languedoc region of France.

Word derivation for "mountain" :
Hungarian = hegy (which I transliterate to hedy)
Finnish = vuori
Samgur = vordy

Note: the dy in vordy is pronounced similar to the dy in Goodyear.

valley is lávol

lávol = valley
alternate spelling: lahvol

Some things Google found for "lávol" and "lavol":
Lavol is a rare last name. Lavol is a rare generally masculine first name. In Taiwan Lavol is a brand name of the drug Nimetazepam. Similar távol means far, distant in Hungarian. Lavol is the name of a place in the Languedoc-Roussillon region of France.

Word derivation for "valley" :
Hungarian = völgy (which I transliterate to völdy)
Finnish = laakso (which I transliterate to lákso)
Samgur = lávol

Lávol replaces vollá as the Samgur word for valley.