house dick vs house detective

house dick and house detective both are nouns.

Word	Noun	Adjective	Verb	Adverb
house dick	Yes	No	No	No
house detective	Yes	No	No	No

As nouns, house dick and house detective are synonyms defined as:

house dick and house detective: a private detective employed by a hotel or retail store

Other synonyms of house dick include hotel detective.

house dick (noun)	house detective (noun)
a private detective employed by a hotel or retail store	a private detective employed by a hotel or retail store