row house vs town house

row house and town house both are nouns.

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

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

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

row house (noun)	town 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