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

2 senses of yammer

Sense 1
howl, wrawl, yammer, yowl -- (cry loudly, as of animals; "The coyotes were howling in the desert")
       => utter, emit, let out, let loose -- (express audibly; utter sounds (not necessarily words); "She let out a big heavy sigh"; "He uttered strange sounds that nobody could understand")

Sense 2
whine, grizzle, yammer, yawp -- (complain whiningly)
       => complain, kick, plain, sound off, quetch, kvetch -- (express complaints, discontent, displeasure, or unhappiness; "My mother complains all day"; "She has a lot to kick about")