Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun boo

1 sense of boo

Sense 1
boo, hoot, Bronx cheer, hiss, raspberry, razzing, razz, snort, bird -- (a cry or noise made to express displeasure or contempt)
       => cry, outcry, call, yell, shout, vociferation -- (a loud utterance; often in protest or opposition; "the speaker was interrupted by loud cries from the rear of the audience")

Antonyms of verb boo

1 sense of boo

Sense 1
boo, hiss -- (show displeasure, as after a performance or speech)
       Antonym of applaud (Sense 1)
      => applaud, clap, spat, acclaim -- (clap one's hands or shout after performances to indicate approval)

Synonyms/Hypernyms (Ordered by Estimated Frequency) of verb boo

1 sense of boo

Sense 1
boo, hiss -- (show displeasure, as after a performance or speech)
       => condemn -- (declare or judge unfit for use or habitation; "The building was condemned by the inspector")