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Undercreep
- To creep secretly or privily.
Undercrest
- To support as a crest; to bear.
Undercroft
- A subterranean room of any kind; esp., one under a church (see Crypt), or one used as a chapel or for any sacred purpose.
Underdealing
- Crafty, unfair, or underhand dealing; unfair practice; trickery.
Underdig
- To dig under or beneath; to undermine.
Underditch
- To dig an underground ditch or ditches in, so as to drain the surface; to underdrain; as, to underditch a field or a farm.
Underdo
- To do less than is requisite or proper; -- opposed to overdo.
Underdoer
- One who underdoes; a shirk.