openmouthed (adj.)
- advertent
- agape
- aghast
- agog
- ajar
- alert
- amazed
- assiduous
- astonished
- astounded
- attentive
- aware
- awed
- awestruck
- beguiled
- bewildered
- bewitched
- blatant
- boisterous
- breathless
- captivated
- careful
- clamorous
- concentrated
- confounded
- conscious
- crying
- curious
- dehiscent
- diligent
- dumbfounded
- dumbstruck
- earnest
- enchanted
- enraptured
- enthralled
- entranced
- fascinated
- finical
- finicky
- flabbergasted
- gaping
- ghoulish
- gossipy
- heedful
- hypnotized
- inquiring
- inquisitive
- intense
- intent
- interested
- itchy
- mesmerized
- meticulous
- mindful
- morbid
- nice
- niggling
- noisy
- observant
- observing
- obstreperous
- open-eyed
- oscitant
- overcurious
- popeyed
- prurient
- puzzled
- quizzical
- regardful
- ringent
- screaming
- spellbound
- staring
- strident
- stupefied
- surprised
- thunderstruck
- vociferous
- voyeuristic
- watchful
- wide-eyed
- wonder-struck
- wondering
- yawning
