razzing vs boo

razzing and boo both are nouns.

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

As nouns, razzing and boo are synonyms defined as:

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

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

razzing (verb)	boo (verb)
	show displeasure, as after a performance or speech