telecom hotel vs telco building

telecom hotel and telco building both are nouns.

Word	Noun	Adjective	Verb	Adverb
telecom hotel	Yes	No	No	No
telco building	Yes	No	No	No

As nouns, telecom hotel and telco building are synonyms defined as:

telecom hotel and telco building: a building that houses telecommunications equipment

telecom hotel (noun)	telco building (noun)
a building that houses telecommunications equipment	a building that houses telecommunications equipment