Compassion is a noun.
No, but it's part of a noun which the noun is the part of speech.
Proper is an adjective.
Truman is a name, so therefore as a part of speech it is a proper noun.
Proper adjective
Proper noun
A proper noun.
Proper noun
Proper noun.
Proper is an adjective, factor is a noun.
Britain is a proper noun.
Bethlehem is a proper noun.
Springfield is a proper noun.