safe house vs refuge

safe house and refuge both are nouns.

Word	Noun	Adjective	Verb	Adverb
safe house	Yes	No	No	No
refuge	Yes	No	No	No

As nouns, refuge is a hypernym of safe house; that is, refuge is a word with a broader meaning than safe house:

safe house: a house used as a hiding place or refuge by members of certain organizations
refuge: a shelter from danger or hardship

Other hypernyms of safe house include house, asylum, sanctuary.

safe house (noun)	refuge (noun)
a house used as a hiding place or refuge by members of certain organizations	act of turning to for assistance
	a shelter from danger or hardship
	something or someone turned to for assistance or security
	a safe place