7 Chars:
10 UNACTED
 8 UNADULT
 8 UNAGILE
 9 UNAGING
 9 UNAIDED
10 UNAIMED
 8 UNAIRED
11 UNAKITE
11 UNALIKE
12 UNAPTLY
10 UNARMED
12 UNASKED
10 UNAWARE
14 UNBAKED
10 UNBASED
10 UNBATED
 9 UNBEARS
 9 UNBELTS
10 UNBENDS
10 UNBINDS
 9 UNBLEST
15 UNBLOCK
 9 UNBOLTS
10 UNBONED
11 UNBOSOM
10 UNBOUND
13 UNBOWED
17 UNBOXED
16 UNBOXES
11 UNBRACE
10 UNBRAID
13 UNBRAKE
13 UNBROKE
10 UNBUILD
 9 UNBUILT
16 UNBULKY
 9 UNBURNT
11 UNCAGED
10 UNCAGES
14 UNCAKED
13 UNCAKES
12 UNCANNY
10 UNCASED
 9 UNCASES
12 UNCHAIN
15 UNCHARY
16 UNCHOKE
 9 UNCIALS
 9 UNCINAL
 9 UNCINUS
12 UNCIVIL
13 UNCLAMP
11 UNCLASP
 9 UNCLEAN
 9 UNCLEAR
11 UNCLIPS
13 UNCLOAK
10 UNCLOGS
 9 UNCLOSE
10 UNCLOUD
15 UNCOCKS
11 UNCODED
 9 UNCOILS
13 UNCOMIC
13 UNCORKS
12 UNCOUTH
12 UNCOVER
 9 UNCRATE
21 UNCRAZY
 9 UNCROSS
12 UNCROWN
 9 UNCTION
15 UNCUFFS
11 UNCURBS
10 UNCURED
 9 UNCURLS
 9 UNDATED
 9 UNDERDO
 9 UNDERGO
 8 UNDINES
14 UNDOCKS
 8 UNDOERS
 9 UNDOING
10 UNDRAPE
11 UNDRAWN
11 UNDRAWS
 8 UNDRESS
 8 UNDREST
 9 UNDRIED
12 UNDRUNK
 8 UNDULAR
12 UNDYING
 8 UNEAGER
10 UNEARTH
 7 UNEASES
 7 UNEATEN
 9 UNENDED
16 UNEQUAL
12 UNFADED
13 UNFAITH
15 UNFAKED
15 UNFANCY
20 UNFAZED
12 UNFENCE
11 UNFIRED
13 UNFITLY
18 UNFIXED
17 UNFIXES
11 UNFOLDS
11 UNFOUND
11 UNFREED
10 UNFREES
16 UNFROCK
19 UNFROZE
13 UNFUNNY
10 UNFURLS
11 UNFUSED
13 UNFUSSY
 9 UNGIRDS
11 UNGLOVE
 9 UNGLUED
 8 UNGLUES
12 UNGODLY
 9 UNGUARD
 8 UNGUENT
 8 UNGULAE
 8 UNGULAR
10 UNHAIRS
11 UNHANDS
14 UNHANDY
11 UNHANGS
17 UNHAPPY
13 UNHASTY
11 UNHEARD
12 UNHELMS
11 UNHINGE
11 UNHIRED
15 UNHITCH
11 UNHOODS
14 UNHOOKS
13 UNHOPED
10 UNHORSE
10 UNHOUSE
12 UNHUMAN
14 UNHUSKS
 9 UNICORN
 8 UNIDEAL
12 UNIFACE
11 UNIFIED
10 UNIFIER
10 UNIFIES
12 UNIFORM
10 UNIPODS
16 UNIQUER
16 UNIQUES
 7 UNISONS
 8 UNITAGE
 8 UNITARD
10 UNITARY
 7 UNITERS
 7 UNITIES
 8 UNITING
10 UNITIVE
16 UNITIZE
16 UNJADED
14 UNJOINT
15 UNKEMPT
15 UNKINKS
11 UNKNITS
11 UNKNOTS
14 UNKNOWN
10 UNLACED
 9 UNLACES
 9 UNLADED
 8 UNLADEN
 8 UNLADES
12 UNLATCH
 8 UNLEADS
 7 UNLEARN
10 UNLEASH
10 UNLEVEL
 8 UNLINED
11 UNLINKS
11 UNLIVED
10 UNLIVES
 8 UNLOADS
10 UNLOBED
13 UNLOCKS
 7 UNLOOSE
11 UNLOVED
16 UNLUCKY
14 UNMACHO
13 UNMAKER
13 UNMAKES
12 UNMANLY
13 UNMASKS
10 UNMATED
 9 UNMEANT
12 UNMERRY
13 UNMEWED
10 UNMINED
 9 UNMITER
 9 UNMITRE
17 UNMIXED
16 UNMIXES
10 UNMOLDS
 9 UNMOORS
 9 UNMORAL
13 UNMOVED
 7 UNNAILS
10 UNNAMED
10 UNNERVE
10 UNNOISY
 8 UNNOTED
 8 UNOILED
11 UNOWNED
15 UNPACKS
11 UNPAGED
13 UNPAVED
15 UNPICKS
10 UNPILED
 9 UNPILES
 9 UNPLAIT
10 UNPLUGS
10 UNPOSED
16 UNQUIET
16 UNQUOTE
12 UNRAKED
 8 UNRATED
10 UNRAVEL
17 UNRAZED
11 UNREADY
 7 UNREELS
10 UNREEVE
 7 UNRESTS
10 UNRIMED
 9 UNRIPER
 7 UNRISEN
10 UNROBED
 9 UNROBES
 7 UNROLLS
10 UNROOFS
 7 UNROOTS
10 UNROPED
11 UNROUGH
 8 UNROUND
10 UNROVEN
 8 UNRULED
 8 UNSATED
11 UNSAVED
11 UNSAWED
12 UNSCREW
 7 UNSEALS
 9 UNSEAMS
 7 UNSEATS
 7 UNSELLS
11 UNSEWED
15 UNSEXED
14 UNSEXES
12 UNSHARP
10 UNSHELL
13 UNSHIFT
12 UNSHIPS
10 UNSHORN
16 UNSHOWY
11 UNSIGHT
17 UNSIZED
 8 UNSLING
 8 UNSLUNG
 9 UNSMART
 9 UNSNAPS
 7 UNSNARL
 9 UNSOBER
 8 UNSOLID
12 UNSONCY
10 UNSONSY
 8 UNSOUND
11 UNSOWED
13 UNSPEAK
 9 UNSPENT
 9 UNSPILT
 9 UNSPLIT
13 UNSPOKE
13 UNSTACK
 7 UNSTATE
 7 UNSTEEL
 9 UNSTEPS
13 UNSTICK
 9 UNSTOPS
 9 UNSTRAP
13 UNSTUCK
 8 UNSTUNG
10 UNSWEAR
12 UNSWEPT
10 UNSWORE
10 UNSWORN
13 UNTACKS
11 UNTAKEN
10 UNTAMED
15 UNTAXED
12 UNTEACH
14 UNTHINK
 8 UNTIRED
 8 UNTREAD
 8 UNTRIED
 9 UNTRIMS
 7 UNTRUER
10 UNTRULY
 7 UNTRUSS
10 UNTRUTH
13 UNTUCKS
 8 UNTUNED
 7 UNTUNES
10 UNTWINE
10 UNTWIST
11 UNTYING
 9 UNURGED
 7 UNUSUAL
10 UNVEILS
18 UNVEXED
12 UNVOCAL
12 UNVOICE
18 UNWAXED
13 UNWEARY
13 UNWEAVE
13 UNWHITE
11 UNWINDS
10 UNWISER
11 UNWOOED
11 UNWOUND
13 UNWOVEN
12 UNWRAPS
11 UNWRUNG
15 UNYOKED
14 UNYOKES
11 UNYOUNG
17 UNZONED

6 Chars:
 8 UNABLE
 8 UNAGED
10 UNAKIN
 8 UNARMS
10 UNAWED
 8 UNBANS
 8 UNBARS
 8 UNBEAR
 8 UNBELT
 9 UNBEND
 8 UNBENT
 9 UNBIND
 8 UNBOLT
 8 UNBORN
 9 UNBRED
11 UNBUSY
 9 UNCAGE
12 UNCAKE
10 UNCAPS
 8 UNCASE
13 UNCHIC
 8 UNCIAE
 8 UNCIAL
 8 UNCINI
 9 UNCLAD
 8 UNCLES
10 UNCLIP
 9 UNCLOG
14 UNCOCK
 8 UNCOIL
 8 UNCOOL
12 UNCORK
14 UNCUFF
10 UNCURB
 8 UNCURL
 8 UNCUTE
 8 UNDEAD
 7 UNDIES
 7 UNDINE
13 UNDOCK
 7 UNDOER
 7 UNDOES
 7 UNDONE
10 UNDRAW
10 UNDREW
10 UNDULY
11 UNDYED
 6 UNEASE
 9 UNEASY
 9 UNEVEN
 9 UNFAIR
 9 UNFELT
 9 UNFITS
16 UNFIXT
10 UNFOLD
10 UNFOND
 9 UNFREE
 9 UNFURL
 8 UNGIRD
 7 UNGIRT
 7 UNGLUE
 7 UNGUAL
 7 UNGUES
 7 UNGUIS
 7 UNGULA
 9 UNHAIR
10 UNHAND
10 UNHANG
 9 UNHATS
11 UNHELM
12 UNHEWN
12 UNHOLY
10 UNHOOD
13 UNHOOK
10 UNHUNG
 9 UNHURT
13 UNHUSK
11 UNIFIC
 6 UNIONS
 9 UNIPOD
15 UNIQUE
13 UNISEX
 6 UNISON
 7 UNITED
 6 UNITER
 6 UNITES
13 UNJUST
11 UNKEND
10 UNKENT
12 UNKEPT
11 UNKIND
14 UNKINK
10 UNKNIT
10 UNKNOT
 8 UNLACE
 7 UNLADE
 7 UNLAID
 9 UNLASH
 9 UNLAYS
 7 UNLEAD
 6 UNLESS
10 UNLIKE
10 UNLINK
 9 UNLIVE
 7 UNLOAD
12 UNLOCK
 9 UNMADE
12 UNMAKE
 8 UNMANS
12 UNMASK
 8 UNMEET
11 UNMESH
11 UNMEWS
15 UNMIXT
 9 UNMOLD
 8 UNMOOR
11 UNMOWN
 6 UNNAIL
 8 UNOPEN
14 UNPACK
 9 UNPAID
 9 UNPEGS
 8 UNPENS
 8 UNPENT
14 UNPICK
 8 UNPILE
 8 UNPINS
 9 UNPLUG
 8 UNPURE
 7 UNREAD
 6 UNREAL
 6 UNREEL
 6 UNRENT
 6 UNREST
 7 UNRIGS
 8 UNRIPE
 8 UNRIPS
 8 UNROBE
 6 UNROLL
 9 UNROOF
 6 UNROOT
 9 UNROVE
 9 UNRULY
 9 UNSAFE
 7 UNSAID
 9 UNSAWN
 9 UNSAYS
 6 UNSEAL
 8 UNSEAM
 6 UNSEAT
 6 UNSEEN
 6 UNSELL
 6 UNSENT
 6 UNSETS
 9 UNSEWN
 9 UNSEWS
16 UNSEXY
10 UNSHED
11 UNSHIP
10 UNSHOD
 9 UNSHUT
 8 UNSNAP
 7 UNSOLD
 9 UNSOWN
 8 UNSPUN
 8 UNSTEP
 8 UNSTOP
 7 UNSUNG
10 UNSUNK
 6 UNSURE
12 UNTACK
 8 UNTAME
10 UNTIDY
 7 UNTIED
 6 UNTIES
 7 UNTOLD
 6 UNTORN
 8 UNTRIM
 7 UNTROD
 6 UNTRUE
12 UNTUCK
 6 UNTUNE
 7 UNUSED
 9 UNVEIL
16 UNVEXT
12 UNWARY
 9 UNWELL
11 UNWEPT
10 UNWIND
 9 UNWISE
12 UNWISH
 9 UNWITS
 9 UNWORN
12 UNWOVE
11 UNWRAP
13 UNYOKE
17 UNZIPS

5 Chars:
 5 UNAIS
 7 UNAPT
 7 UNARM
 8 UNARY
 5 UNAUS
 7 UNBAN
 7 UNBAR
 8 UNBID
14 UNBOX
 9 UNCAP
 7 UNCIA
 7 UNCLE
 7 UNCOS
10 UNCOY
 7 UNCUS
 7 UNCUT
 6 UNDEE
 6 UNDER
 7 UNDID
 6 UNDUE
 9 UNFED
 8 UNFIT
15 UNFIX
 6 UNGOT
 8 UNHAT
10 UNHIP
11 UNIFY
 5 UNION
 5 UNITE
 5 UNITS
 8 UNITY
 8 UNLAY
 6 UNLED
 5 UNLET
 5 UNLIT
 7 UNMAN
 7 UNMET
10 UNMEW
14 UNMIX
 8 UNPEG
 7 UNPEN
 7 UNPIN
 6 UNRIG
 7 UNRIP
 8 UNSAY
 5 UNSET
 8 UNSEW
12 UNSEX
 5 UNTIE
 5 UNTIL
 9 UNWED
 8 UNWIT
 8 UNWON
16 UNZIP

4 Chars:
 4 UNAI
 4 UNAU
 6 UNBE
 6 UNCI
 6 UNCO
 5 UNDE
 5 UNDO
 8 UNDY
 4 UNIT
 4 UNTO

3 Chars:
 3 UNS

2 Chars:
 2 UN