cwm vs cirque

cwm and cirque both are nouns.

Word	Noun	Adjective	Verb	Adverb
cwm	Yes	No	No	No
cirque	Yes	No	No	No

As nouns, cwm and cirque are synonyms defined as:

cwm and cirque: a steep-walled semicircular basin in a mountain; may contain a lake

Other synonyms of cwm include corrie.

cwm (noun)	cirque (noun)
a steep-walled semicircular basin in a mountain; may contain a lake	a steep-walled semicircular basin in a mountain; may contain a lake