boo vs razz

boo and razz both are nouns.

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

As nouns, boo and razz are synonyms defined as:

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

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

boo (verb)	razz (verb)
show displeasure, as after a performance or speech	harass with persistent criticism or carping