cooling vs freezing

cooling and freezing both are nouns.

Word	Noun	Adjective	Verb	Adverb
cooling	Yes	No	No	No
freezing	Yes	No	No	No

As nouns, freezing is a hyponym of cooling; that is, freezing is a word with a more specific, narrower meaning than cooling:

cooling: the process of becoming cooler; a falling temperature
freezing: the withdrawal of heat to change something from a liquid to a solid

Other hyponyms of cooling include freeze, heat dissipation, infrigidation, refrigeration.

cooling (noun)	freezing (noun)
a mechanism for keeping something cool	the withdrawal of heat to change something from a liquid to a solid
the process of becoming cooler; a falling temperature