http://www.ccel.org/ccel/schaff/anf01.html
Schaff is not be trusted at all given his "emendations" in among others Tertullian, but on this level it seems safe to collect.
I went through the text, reformatted it completely, and attached is the clean version from the PDF - the Greek got lost though
I took everything capitalised, threw away what was English yet not all of it, so YMMV.
The words below are guaranteed to be present at least once in any of his five books "Against Heresies".
If you have any comments, please shoot - this is how I do research, I digitise everything down to a searchable format which allows me to handle dozens, even hundreds of texts on one single topic
Abba
Abednego
Abel
Abiron
Abiud
Abraham
Abraham’s
Abraxas
Acataleptos
Achamoth
Achilles
Acinetos
Acphranœ
Adam
Adamas
Addonai
Adonai
Adoneus
Agape
Agennetos
Ageratos
Ahaz
Ainos
Aionios
Alas
Aletheia
Alexander
Alexandria
Amalek
Amorites
Amos
Anacletus
Ananias
Anaxagoras
Anaxilaus
Anaximander
Anennoetos
Anicetus
Anna
Annas
Anonomastos
Anthropos
Antichrist
Antioch
Antiphanes
Aoratos
Apator
Aphtharsia
Aquila
Arche
Aristotle
Armenian
Armogenes
Arrhetos
Arrhetus
Artaxerxes
Artificer
Astanphæus
Augustus
Authadia
Autogenes
Autophyes
Azarias
Azazel
Babaphor
Babylon
Balaam
Barachias
Barbeliotes
Barbelos
Barnabas
Basema
Basilides
Bathsheba
Baœnaora
Bel
Beta
Bethany
Bethlehem
Borborians
Burgon
Burton
Bythi
Bythius
Bythus
Cadmus
Caiaphas
Cain
Cainites
Cana
Canaan
Capernaum
Carmel
Carpistes
Carpocrates
Catholic
Caulacau
Cerdo
Cerdon
Cerinthus
Chaldœaur
Chamosse
Chaos
Charis
Chi
Chore
Chreistus
Christ
Christi
Christian
Christians
Christus
Cilicia
Claudius
Clement
Colorbasus
Colossians
Corinth
Corinthians
Cornelius
Cosmocrator
Counsellor
Creator
Crescens
Cucumber
Cynics
Cyprus
Cyrene
Cyrus
Cæsar
Cæsarea
Daleth
Dalmatia
Damascus
Daniel
Daphne
Dathan
David
Decad
Decalogue
Deity
Deliverer
Delta
Demas
Demiurge
Demiurgi
Demiurgo
Demiurgum
Demiurgus
Democritus
Deum
Deus
Deuteronomy
Diatheses
Domitian’s
Duo
Duodecad
Dyad
Dynamis
Dædalus
Ebionites
Ecclesia
Ecclesiasticus
Eden
Egypt
Egyptians
El
Ele
Eleazar
Eleleth
Eleutherius
Elias
Elijah
Elisabeth
Elisha
Elizabeth
Eloeus
Eloi
Eloë
Elpis
Emmanuel
Empedocles
Encratites
Encratitæ
Ennœa
Enoch
Enthymesis
Ep
Epaphroditus
Ephesian
Ephesians
Ephesus
Ephraim
Ephron
Epicurus
Episemon
Epistle
Epistles
Epithymia
Epsilon
Erinnys
Esaias
Esau
Esdras
Eta
Ethiopia
Ethiopians
Eucharist
Eudocetos
Evangelists
Evanthas
Evaristus
Eve
Ezekiel
Fashioner
Father
Founder
Framer
Gabriel
Galatia
Galatians
Galilee
Gamma
Gaul
Genesis
Gentile
Gentiles
Ghost
Gideon
Gnosis
Gnostic
Gnostics
God
God-like
Godhead
Gomorrah
Gospel
Gospels
Gourd
Greek
Greeks
Habakkuk
Hades
Hagar
Haggai
Ham
Harvey
Hebdomad
Hebdomas
Hebraicis
Hebrew
Hebrews
Hecatads
Hedone
Helena
Hen
Henosis
Henotes
Herod
Hesiod
Hittites
Homer
Homeric
Horeb
Horos
Horothetes
Horus
Hosea
How
Hyginus
Hystera
Ialdabaoth
Iao
Ignatius
Iota
Irenæo
Irenæus
Isaac
Isaiah
Israel
Israelite
Israelites
Ithamar
Iu
Jacob
James
Jechoniah
Jeremiah
Jeroboam
Jerusalem
Jesse
Jesus
Jew
Jewish
Jews
Joachim
Joel
John
Jonah
Jonas
Jordan
Joseph
Joshua
Jove
Judah
Judaic
Judas
Judea
Judæa
Jupiter
Justin
Justin’s
Kakia
Kalachthei
Kappa
Keltæ
Korah
Kousta
Lagus
Lambda
Lateinos
Latin
Latins
Lazarus
Lernæan
Levi
Levites
Liberator
Libya
Linus
Logos
London
Lord
Luke
Lyons
Lytrotes
Macaria
Macariotes
Macedonia
Macedonians
Magi
Magus
Maker’s
Malachi
Mamuel
Marcellina
Marcion
Marcionites
Marcosians
Marcus
Mary
Massuet’s
Master
Matt
Matthew
Matthias
Meander
Medes
Mediator
Melon
Menander
Meshach
Messia
Metagoges
Metricos
Metropator
Micah
Michael
Michaiah
Miletus
Minerva
Misaël
Mistadia
Mixis
Monad
Monads
Monas
Monogenes
Monotes
Montanists
Mosaic
Moses
Mosomedœa
Mu
Murray
Mystic
Nadab
Nahum
Namempsœman
Nathan
Nathanael
Nazareth
Nazaria
Nebuchadnezzar
Nicolaitanes
Nicolaitans
Nicolas
Nile
Ninevites
Noah
Noe
Norea
Nous
Nu
Nun
Oceanus
Ogdoad
Ogdoads
Omega
Omicron
Oniropompi
Ophites
Oreus
Origen’s
Palamedes
Pan
Pandora
Pandoros
Papias
Paraclete
Paracletus
Paradise
Paredri
Paris
Pater
Patricos
Paul
Pentad
Pentecost
Persians
Peter
Pharaoh
Phares
Pharisee
Pharisees
Pheu
Phi
Philip
Philippi
Philippians
Phronesis
Phthonos
Phœnicia
Pi
Pilate
Pistis
Pius
Plato
Plenitude
Pleroma
Pleromas
Pluto
Polycarp
Pontius
Pontus
Preserver
Principality
Proanennoetos
Proarche
Prognosis
Promises
Propator
Proper
Protarchontes
Proön
Prunica
Prunicus
Psalm
Psaua
Psi
Ptolemy
Ptolemæus
Puteoli
Pythagoras
Pythagorean
Pythagoreans
Quotations
Rabbi
Raca
Raguel
Rebekah
Retributor
Rho
Rhone
Roman
Romans
Rome
Ruada
Sabaoth
Sabbath
Sabbaths
Sadducees
Sage
Samael
Samaria
Samaritan
Samaritans
Samothracia
Samuel
Sarah
Satan
Saturninus
Saul
Saviour
Sciolus
Scripture
Scriptures
Searcher
Secundus
Septenad
Seth
Sethians
Shadrach
Sige
Sigma
Silas
Siloam
Simeon
Simon
Simonians
Sinistra
Sixtus
Smyr
Smyrna
Sodom
Sodomites
Sodore
Solomon
Sophia
Sorer
Soter
Souls
Spain
Spirit
Spiritus
Stauros
Stephen
Stoics
Strange
Sustainer
Syncrasis
Synesis
Syria
Syriac
Tamar
Tartarus
Tatian
Tau
Teitan
Telephorus
Terra
Testament
Testaments
Tethys
Tetrad
Tetrads
Thales
Thamar
Thelema
Thelesis
Theletos
Theletus
Theodotion
Theogony
Thessalonians
Thessalonica
Theta
Tiberias
Tiberius
Timothy
Titan
Titus
Tobias
Trajan
Treats
Triacontad
Triad
Troas
Tyre
Ultramontane
Uphareg
Upsilon
Uriah
Utter-Emptiness
Valentinian
Valentinians
Valentinus
Virtues
Wisdom
Wist
Zaccheus
Zacharias
Zara
Zebedee
Zechariah
Zelos
Zephaniah
Zerubbabel
Zeta
Zion
Zoe
Zohar