underacylation
A less than normal degree of acylation

underadditivity
The condition of being underadditive

underadduction
Hypoadduction.

underadherence
Insufficient adherence to a treatment.

underadjustment
An insufficient adjustment

underadjustments
plural of underadjustment

underagitation
Insufficient agitation (e.g. of a substance being mixed).

underallocation
A less than normal, or insufficient, allocation.

underallocations
plural of underallocation

underallotment
An excessively small allotment or portion.

underallotments
plural of underallotment

underambition
The quality of being underambitious.

underamplification
insufficient amplification

underamplifications
plural of underamplification

underanalysis
Inadequate analysis.

underannotation
insufficient annotation

underanticoagulation
Insufficient anticoagulation (having received warfarin therapy for only a short time)

underapplication
The act of underapplying.

underapplications
plural of underapplication

underappraisal
An appraisal that undervalues something.

underappraisals
plural of underappraisal

underappreciation
insufficient appreciation

underapproximation
An approximation that is lower than the true value.

underapproximations
plural of underapproximation

underarousal
Less than the normal extent of arousal

underarticulation
Deliberately leaving an utterance indistinct or unarticulated.

underascertainment
Insufficient ascertainment

underassertiveness
A tendency toward being underassertive; social timidity.

underassessment
The assessment of a tax or charge at a lower value than the correct one.
An inadequate assessment of an academic course, as by requiring too few pieces of work from each student.

underassessments
plural of underassessment

underassistant
A secondary or lesser assistant.

underassistants
plural of underassistant

underattainment
Less than the normal or desired attainment

underattendance
Attendance too infrequently, or by too few.

underattention
Insufficient attention.

underattenuation
Insufficient attenuation

underattribution
Insufficient or inadequate attribution.

underattributions
plural of underattribution

underbone
A small motorcycle built on a frame consisting mostly of one large-diameter tubular component.

underbones
plural of underbone

underbrag
A confident statement involving openly acknowledging shortcomings, demonstrating indifference to others' opinions.

underbranch
A lower branch.
A twig or branchlet.

underbranches
plural of underbranch

underbredness
The state or condition of being underbred.

undercalculation
Calculation producing too small a result.

undercalculations
plural of undercalculation

undercapitalisation
Alternative form of undercapitalization.

undercapitalization
Insufficient capitalization

undercarboxylation
The quality of being undercarboxylated.

undercellar
A lower cellar.

undercellars
plural of undercellar

underchamber
A lower chamber; a room that lies beneath.

underchambers
plural of underchamber

underchins
plural of underchin

underchlorination
Insufficient chlorination (usually, of swimming pool water or drinking water).

undercitation
Insufficient citation.

underclassness
The quality or condition of belonging to the underclass.

underclerkship
The position of underclerk.

underclustering
Insufficient clustering

underclusterings
plural of underclustering

undercollection
Insufficient collection, as:
Insufficient collection, as:
Insufficient collection, as:

undercollections
plural of undercollection

undercommunication
Too little communication.

undercompensation
Insufficient compensation

undercompliance
Partial compliance, short of what is necessary.

underconfidence
Insufficient confidence.

underconnectedness
The condition of being underconnected

underconnectivity
Insufficient connectivity

underconsciousness
An underlying consciousness.

underconsciousnesses
plural of underconsciousness

underconstable
A lower or subordinate constable.

underconstables
plural of underconstable

underconstancy
The tendency to underestimate the size of an object when it is viewed from a distance.

underconstrainedness
The state or quality of being underconstrained

underconsumption
Insufficient consumption (for financial stability).
An anticonsumerist lifestyle trend based around reuse and not purchasing unnecessary goods.

undercontextualization
The result or process of undercontextualizing.

undercorrection
Insufficient correction.

undercorrections
plural of undercorrection

undercoupling
The act of coupling two tuned transformers so as to create a narrower bandwidth.

undercoverage
Insufficient coverage (inadequate representation in a sample)

undercoverness
The state or condition of being undercover.

undercriminalization
The fact or process of not criminalizing enough.

undercrypt
A lower crypt or vault.

undercrypts
plural of undercrypt

underculture
A subculture, a non-dominant culture of a portion of a society, as opposed to the society's overculture.

undercultures
plural of underculture

undercurve
The curve formed by the underside of something.

undercurves
plural of undercurve

underdefinition
The act or process of underdefining; inadequate definition.

underdensities
plural of underdensity

underdensity
The condition or extent of being underdense.

underdetection
Detection at excessively low levels, or at levels lower than are actually the case

underdetermination
The state or quality of being underdetermined

underdeterminedness
The condition of being underdetermined.

underdeterrence
inadequate deterrence

underdevelopedness
Synonym of underdevelopment (“state or condition of being underdeveloped”).

underdevelopment
The condition of being underdeveloped.

underdevelopments
plural of underdevelopment

underdeviation
A deviation from a target that results in less of something than was desired.

underdeviations
plural of underdeviation

underdiagnosis
The failure to diagnose a condition in a significant proportion of patients.

underdialysis
Insufficient dialysis.

underdifferentiation
Insufficient differentiation.

underdifferentiations
plural of underdifferentiation

underdilation
Less than normal dilation

underdilution
Insufficient dilution.

underdiscrimination
Less than normal discrimination

underdispersion
Insufficient dispersion

underdistribution
An inadequate distribution (especially of money).

underdistributions
plural of underdistribution

underdiversification
Insufficient diversification.

underdoggism
Alternative form of underdogism.

underdogism
Tenacious support for the underdog, or disadvantaged party

underdominance
Less than normal dominance

underedge
A lower edge, or underside of an edge.

underedges
plural of underedge

undereducation
The state of being undereducated or the practice of undereducating.

underemphases
plural of underemphasis

underemphasis
Insufficient emphasis.

underemployment
The condition of being underemployed.

underenforcement
Inadequate enforcement (of a law, statute, etc.).

underenrichment
Insufficient enrichment

underentitlement
The condition of being underentitled.

underenumeration
Insufficient counting, particularly in the census.

undereruption
The state of being undererupted, with less of the tooth visible than is normal.

underestimation
The act of underestimating.
An underestimate.

underestimations
plural of underestimation

underetch
To etch too shallowly.

underetched
simple past and past participle of underetch

underetches
third-person singular simple present indicative of underetch

underexcretion
inadequate excretion of something

underexpansion
Insufficient expansion

underexpansions
plural of underexpansion

underexpenditure
An insufficient expenditure

underexploitation
Insufficient exploitation.

underexploitations
plural of underexploitation

underexposure
The condition of being underexposed.
An insufficient, or less than usual, exposure.

underexposures
plural of underexposure