A proper noun is the name of a specific person, place or thing.
A proper noun for the common noun 'house' it the name of a specific house, for example:
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A proper noun is the name of a specific person, place or thing.
A proper noun for the common noun 'house' it the name of a specific house, for example:
No, - houses is a plural noun = more than one house. eg The houses are expensive.
House's is a possessive noun. eg The houses's windows are all broken