terraced house vs town house

terraced house and town house both are nouns.

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

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

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

Other hypernyms of terraced house include row house.

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