gru-gru or groo-groo /grooˈgroo/

1. A name for several tropical American palms related to the coconut palm, yielding oil-nuts
2. An edible weevil grub (also gru-gru worm) found in their pith

• field guns
• field hand
• field hands
• field hockey
• field hospital
• field hospitals
• field ice
• fielding
• fieldings
• field-ion microscope
• field-ion microscopes
• field kitchen
• field kitchens
• field lark
• field larks
• field madder
• field mark
• field marks
• field marshal
• field marshals
• field meeting
• field meetings
• fieldmice
• fieldmouse
• field mushroom