customshouse vs customhouse

customshouse and customhouse both are nouns.

Word	Noun	Adjective	Verb	Adverb
customshouse	Yes	No	No	No
customhouse	Yes	No	No	No

As nouns, customshouse and customhouse are synonyms defined as:

customshouse and customhouse: a government building where customs are collected and where ships are cleared to enter or leave the country

customshouse (noun)	customhouse (noun)
a government building where customs are collected and where ships are cleared to enter or leave the country	a government building where customs are collected and where ships are cleared to enter or leave the country