kilometers per hour vs kph

kilometers per hour and kph both are nouns.

Word	Noun	Adjective	Verb	Adverb
kilometers per hour	Yes	No	No	No
kph	Yes	No	No	No

As nouns, kilometers per hour and kph are synonyms defined as:

kilometers per hour and kph: the ratio of the distance traveled (in kilometers) to the time spent traveling (in hours)

Other synonyms of kilometers per hour include kilometres per hour, km/h.

kilometers per hour (noun)	kph (noun)
the ratio of the distance traveled (in kilometers) to the time spent traveling (in hours)	the ratio of the distance traveled (in kilometers) to the time spent traveling (in hours)