grou - high
- head resistance
- head restraint
- head river
- head rod
- head sampling
- head sea
- head section
- head shielding system
- head sieve
- head space
- head space technique
- head space vapor
- head speed
- head stack
- head tank
- head tide
- head tip
- head tree
- head tube nipple
- head unit
- head wall
- head water
- head wave
- head way
- head well
- head well puller
- head wind
- head works
- head-and-web separation
- head-changing flexible manufacturing system
- head-drum
- head-end
- head-end amplifier
- head-end station
- head-end treatment
- head-flow curve
- head-indexing table
- head-land ring
- head-on
- head-on approach