- under-insurance
- under-invoice
- under-jaw
- under-king
- under-lease
- under-lessee
- under-lessor
- under-loaded
- under-manager
- under-mixing
- under-officer
- under-petticoat
- under-railing
- under-relaxation
- under-saturated
- under-saturation
- under-secretary
- under-secretaryship
- under-sexed
- under-sheriff
- under-soil
- under-stratum
- under-thrust
- under-timed
- under-tins
- under-titration
- under-trader
- under-treating
- underabsorbed overhead
- underachieve
- underachiever
- underact
- underactive
- underactivity
- underactor
- underappreciated
- underarm
- underation
- underback
- underbade
- underbake
- underbaked
- underbanked
- underbead crack
- underbeam
- underbed
- underbelly
- underbid
- underbid capitalization
- underbid capitalized
- underbidden
- underblanket
- underbody
- underbody structure
- underboiled
- underbolted
- underbooked
- underbought
- underbred
- underbridge
- underbrim
- underbrush
- underbudgeted
- underbunching
- underburning
- underbuy
- undercapitalise
- undercapitalization
- undercapitalize
- undercapitalized
- undercarriage
- undercart
- undercharge
- undercharging
- underclad
- underclass
- underclay
- underclearance
- underclerk
- undercloth
- underclothes
- underclothing
- undercoat
- undercolor separation
- undercompacted
- undercompacted zone
- undercompaction
- undercompensation
- underconcentration
- underconsumption
- underconsumption theory
- undercook
- undercooked
- undercool
- undercooled
- undercooling
- undercooling procedure
- undercooling range
- undercooling rate
- undercooling region