chunnel vs Channel Tunnel

chunnel and Channel Tunnel both are nouns.

Word	Noun	Adjective	Verb	Adverb
chunnel	Yes	No	No	No
Channel Tunnel	Yes	No	No	No

As nouns, chunnel and Channel Tunnel are synonyms defined as:

chunnel and Channel Tunnel: the railroad tunnel between France and England under the English Channel

chunnel (noun)	Channel Tunnel (noun)
the railroad tunnel between France and England under the English Channel	the railroad tunnel between France and England under the English Channel