1. Expression of hesitation
   - er, uh

Encyclopedia: Um

• pentode
• pentose
• Pentothal
• pentoxide
• pentoxifylline
• Pentstemon
• pentylenetetrazol
• penuche
• penuchle
• penult
• penultima
• penultimate
• penumbra
• penumbral
• penurious
• penuriously
• penuriousness
• penury
• Penutian
• peon
• peonage
• peony
• peony family
• people
• People against Gangsterism and Drugs