kph vs km/h

kph and km/h both are nouns.

Word	Noun	Adjective	Verb	Adverb
kph	Yes	No	No	No
km/h	Yes	No	No	No

As nouns, kph and km/h are synonyms defined as:

kph and km/h: the ratio of the distance traveled (in kilometers) to the time spent traveling (in hours)

Other synonyms of kph include kilometers per hour, kilometres per hour.

kph (noun)	km/h (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)