33 entries under plain topic. ×

9
depression(noun, drop, area, decline, fall)
9
valley(noun, area, flat, depression)
4
pampas
4
plain(gorge, vale)
3
downs
3
savanna
3
wold
2
heath
2
alkali flat(expression, idiom)
2
bottom(noun, flat, gorge, valley)
2
champaign country(expression, idiom)
2
desert
2
level
2
llano
2
mesa
2
mesilla
2
moor
2
moorland
2
open country(expression, idiom)
2
plateau
<12>
10 years ago|14k views|share |citing 
APASmart Define. (2016). basin thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/basin/thesaurus/synonyms
ChicagoSmart Define. 2016. "basin thesaurus" https://smartdefine.org/basin/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2016, basin thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/basin/thesaurus/synonyms>.
MLASmart Define. "basin thesaurus" 22 March 2016. Web. 22 September 2026. <https://smartdefine.org/basin/thesaurus/synonyms>