town house vs row house

town house and row house both are nouns.

Word	Noun	Adjective	Verb	Adverb
town house	Yes	No	No	No
row house	Yes	No	No	No

As nouns, town house and row house are synonyms defined as:

town house and row house: a house that is one of a row of identical houses situated side by side and sharing common walls

town house (noun)	row house (noun)
a house that is one of a row of identical houses situated side by side and sharing common walls	a house that is one of a row of identical houses situated side by side and sharing common walls