razz vs razzing

razz and razzing both are nouns.

Word	Noun	Adjective	Verb	Adverb
razz	Yes	No	Yes	No
razzing	Yes	No	No	No

As nouns, razz and razzing are synonyms defined as:

razz and razzing: a cry or noise made to express displeasure or contempt

Other synonyms of razz include bird, boo, Bronx cheer, hiss, hoot, raspberry, snort.

razz (noun)	razzing (noun)
a cry or noise made to express displeasure or contempt	a cry or noise made to express displeasure or contempt

razz (verb)	razzing (verb)
harass with persistent criticism or carping