home from home vs home away from home

home from home and home away from home both are nouns.

Word	Noun	Adjective	Verb	Adverb
home from home	Yes	No	No	No
home away from home	Yes	No	No	No

As nouns, home from home and home away from home are synonyms defined as:

home from home and home away from home: a place where you are just as comfortable and content as if you were home

home from home (noun)	home away from home (noun)
a place where you are just as comfortable and content as if you were home	a place where you are just as comfortable and content as if you were home