penknife/ʹpennief/ noun (pl penknives /ʹpennievz/)

• upbeat
• upbraid
• upbringing
• upcast
• upchuck
• upcoming
• upcountry
• update
• up/down one's alley
• up/down one's street
• updraught
• upend
• upfield
• up for
• up for grabs
• up front
• up-front
• upgrade
• upgrowth
• upheaval
• upheave
• upheld
• uphill
• uphold
• upholster