karat vs kt

karat and kt both are nouns.

Word	Noun	Adjective	Verb	Adverb
karat	Yes	No	No	No
kt	Yes	No	No	No

As nouns, karat and kt are synonyms defined as:

karat and kt: the unit of measurement for the proportion of gold in an alloy; 18-karat gold is 75% gold; 24-karat gold is pure gold

Other synonyms of karat include carat.

karat (noun)	kt (noun)
the unit of measurement for the proportion of gold in an alloy; 18-karat gold is 75% gold; 24-karat gold is pure gold	the unit of measurement for the proportion of gold in an alloy; 18-karat gold is 75% gold; 24-karat gold is pure gold