to whisper
to murmur
to mutter
to mumble
to hiss
to murmur
to breathe
to sigh
to gasp
to grunt
to growl
to purr
to buzz
to hum
to whistle
to chant
to drone
to gabble
to gibber
to stammer
to stutter

to moan
to groan
to whine
to coo
to chirp
to babble
to chatter
to converse
to speak
to say
to talk
to utter
to voice
to articulate
to enunciate
to pronounce
to emit
to breathe out
to exhale
to inhale
to susurrate

to murmurate
to lisp
to intone
to croon
to sermonize
to falter