This list has a counterpart: verbs starting with en-. There isn't a general rule to determine if the affix is used as a prefix or as a suffix. It depends on the way each word evolved. The meaning is the same and there isn't a clear way to determine which version would be used.
The best way is to simply get the full list of each type and work with it instead of trying to come up with a set of rules.
See the full list below:
- ensure
- enjoy
- end
- enter
- encourage
- enable
- enhance
- engage
- enforce
- encounter
- entertain
- endure
- endorse
- enclose
- envisage
- entail
- enquire
- encompass
- endeavour
- envy
- enlarge
- enlist
- endanger
- enrich
- entitle
- enact
- ensue
- entice
- enrol
- enlighten
- engineer
- endow
- engender
- encode
- entrust
- encapsulate
- engulf
- enliven
- encroach
- endear
- encircle
- enumerate
- enthuse
- enslave
- entrench
- entrap
- envelop
- enchant
- enrage
- engined
- energise
- ensnare
- enunciate
- enjoin
- enfold
- entangle
- engrave
- entreat
- energize
- entrain
- enfranchise
- entwine
- encrust
- enure
- ensign
- envision
- enroll
- envelope
- enmesh
- encamp
- encash
- encrypt
- entomb
- ennoble
- engross
- enthrall
- enervate
- encoffined
- entrance
- encapsidate
- encrease
- encyst
- envenom
- enmired
- ensheathed
- enrapture
- enkindle
- enamour
- ensconce
- enfeeble
- enshroud
- entrammel
- ensorcel
- enwind
- enfringe
- encapsidated
- encase
- entame
- enculturate
- enrace
- enioy
- enisle
- entwist
- enisled
- entwite
- enjail
- enrange
- enubilate
- enrank
- enucleate
- entise
- enecate
- enter into
- enter on the boards
- enravish
- enjoy oneself
- enravishing
- entitize
- engird
- engirdle
- enregiment
- enchafe
- engirt
- enregister
- enchain
- engirt
- entitule
- enrheum
- enchannel
- engladden
- enterest
- enambush
- englamour
- enrichen
- enterest
- enamel
- enterfere
- enkennel
- engle
- enridge
- enring
- enamell
- enripen
- end in smoke
- enknit
- end in tears
- enlace
- enrobe
- encharge
- enterlace
- encharm
- enlard
- enchase
- English
- entermete
- enlarge oneself
- envassal
- enchasten
- envault
- enchaunt
- enveigle
- enveil
- enlargen
- endorse out
- enlay
- entoil
- encheer
- enleague
- enlengthen
- enlessen
- enchisel
- enroot
- enlight
- enround
- enamor
- envenime
- envenomate
- enamor'd
- envenoming
- endoctrine
- ensafe
- envermeil
- end up
- enamour'd
- enlimn
- ensample
- encincture
- enlink
- ensanguine
- enlinked
- ensanguined
- envie
- encipher
- envigor
- enscale
- entomologise
- envigorate
- endocytose
- envigourate
- enschedule
- entomologize
- endocytosed
- enlive
- end-of-life
- enseal
- enseam
- encise
- ensear
- Englished
- enlock
- ensearch
- encite
- enseel
- enlumine
- environ
- enclasp
- endamage
- enlute
- ensemble
- endamnify
- Englishify
- enclave
- Englishise
- enmarble
- ensepulcher
- ensepulchre
- enclin'd
- enerve
- enserf
- encline
- endosporulate
- Englishize
- enantioenrich
- enmew
- enantioenriched
- enclined
- endoss
- enmilden
- enmingle
- enmire
- enew
- enshackle
- endark
- enface
- endarken
- enmist
- enshadow
- encloister
- enfame
- ensheath
- endart
- enfamish
- englobe
- enmix
- ensheathe
- endarterectomize
- engloom
- enmove
- englue
- enmuffle
- enshell
- enmure
- enshelter
- enfasten
- englut
- enshield
- enshrine
- endaunger
- enclothe
- encloud
- endazzle
- enfeoff
- engolden
- enclude
- enfetter
- engore
- encoach
- enfever
- engorge
- enfilade
- enfire
- ensilage
- encoffin
- endogenise
- engraff
- ensile
- envoke
- enantioseparate
- enflame
- envolume
- endogenize
- enflesh
- engraft
- ennew
- enskin
- envolve
- endothelialise
- enflower
- ensky
- envowel
- encolden
- enniche
- encolour
- engrail
- engrail
- encomber
- endeavor
- enarch
- engrain
- ensmallen
- ennui
- entrail
- enterplead
- enarm
- ensnarl
- enterprise
- entrain
- enarmor
- engrapple
- ensober
- enarmour
- engrasp
- enforest
- ensonify
- enwall
- enform
- enweaken
- ensorcell
- enwheel
- engrave
- enwiden
- enframe
- ensoul
- enwisen
- encore
- enwoman
- encorporate
- engraven
- enspect
- enwomb
- engraven
- enode
- enspell
- enwrap
- enavigate
- ensphere
- enterprising
- enfranchize
- enstall
- enwrapping
- enfree
- enstamp
- enbibe
- enfreedom
- engreaten
- enwreathe
- enfreeze
- engreen
- enwrite
- enbliss
- engrieve
- enstate
- enblow
- engrieved
- encountre
- endolour
- entertaine
- engroove
- enstool
- entre
- encage
- enstore
- enstraighten
- endenize
- enstraiten
- endenizen
- enstrengthen
- enolize
- enstrew
- encowl
- endenture
- encradle
- enstyle
- entertake
- encanker
- endome
- enzone
- enguard
- encrimson
- encrimsoned
- endower
- engulph
- engyve
- encapsule
- enhabit
- enswathe
- encaptivate
- enhalo
- ensweep
- encapture
- engaol
- enhalse
- ensweeten
- engarland
- encarnalize
- engarrison
- endict
- ent
- endplay
- entabulate
- encasket
- endite
- encastellate
- encastle
- endree
- enharbour
- endizen
- enharden
- enthral
- endrudge
- entrigue
- encave
- enhaunc'd
- enhaunce
- enhearse
- engender
- enhearten
- enhedge
- enculture
- enounce
- encumber
- entangel
- enthrill
- enherite
- enthrone
- enhoney
- endue
- engendre
- enhort
- enduer
- enhunger
- endungeon
- enthronise
- enpatron
- encunt
- enthronize
- enpierce
- encunting
- engift
- encur
- engifted
- encurse
- enplane
- encurtain
- engild
- entayle
- enprison
- encephalize
- engine
- encephalized
- enqueue
- enquicken
- enquire after
- entune
- enturbulate
- enigmatise
- enigmatize
- entwin
- entend
- entender
- enquote
Note: these words have been obtained from Wiktionary and have been classified and improved through automated computer linguistics processes.