diff --git a/txt/by-letter/z.txt b/txt/by-letter/z.txt
index dc5c170..1109504 100644
--- a/txt/by-letter/z.txt
+++ b/txt/by-letter/z.txt
@@ -1,36 +1,15 @@
-zabra
-zabras
-zac
-zachun
-zack
-zacks
-zaffar
-zaffars
-zaffer
-zaffers
-zaffir
-zaffirs
-zafree
-zafrees
 zaftig
 zag
 zags
 zaibatsu
-zaibatsus
 zaikai
 zaikais
-zaire
-zaires
 zakat
-zakats
-zakuska
-zakuskas
 zalambdodont
 zalambdodonts
 zaman
 zamang
 zamangs
-zamans
 zambo
 zambos
 zamia
@@ -39,26 +18,17 @@ zamindar
 zamindari
 zamindaris
 zamindars
-zanana
-zananas
 zander
 zanders
-zanella
-zanellas
 zanier
 zanies
 zaniest
 zanily
 zaniness
-zaninesses
 zany
 zanyish
 zanyism
 zanyisms
-zanza
-zanzas
-zanze
-zanzes
 zap
 zapateado
 zapateados
@@ -70,45 +40,22 @@ zappers
 zapping
 zappy
 zaps
-zapupe
-zapupes
-zaqqum
-zaqqums
-zaque
-zaques
-zarape
-zarapes
 zaratite
 zaratites
 zareba
 zarebas
-zareeba
-zareebas
 zarf
 zarfs
-zariba
-zaribas
-zarnich
-zarnichs
-zati
-zatis
 zax
 zaxes
-zayat
-zayats
 zayin
 zayins
 zazen
-zazens
 zeal
 zealot
 zealotry
 zealots
 zealous
-zeals
-zebeck
-zebecks
-zebecs
 zebra
 zebraic
 zebras
@@ -118,8 +65,6 @@ zebrawood
 zebrawoods
 zebrine
 zebroid
-zebrula
-zebrulas
 zebrule
 zebrules
 zebu
@@ -127,7 +72,6 @@ zebus
 zedoary
 zeds
 zee
-zeed
 zees
 zein
 zeins
@@ -138,9 +82,7 @@ zelkovas
 zels
 zemindari
 zemindaris
-zemindars
 zemni
-zemstva
 zemstvo
 zemstvos
 zenaida
@@ -157,8 +99,6 @@ zephyr
 zephyrs
 zeppelin
 zeppelins
-zerda
-zerdas
 zero
 zeroed
 zeroes
@@ -179,16 +119,9 @@ zesty
 zeta
 zetas
 zetetic
-zetetics
 zeugma
 zeugmas
-zibeth
-zibeths
 zibets
-zibetum
-zibetums
-ziega
-ziegas
 ziff
 ziffs
 zig
@@ -200,17 +133,12 @@ zigzags
 zikurat
 zikurats
 zilch
-zilches
 zill
 zillah
 zillahs
 zillion
 zillions
 zills
-zimbi
-zimbis
-zimocca
-zimoccas
 zinc
 zincate
 zincates
@@ -223,27 +151,12 @@ zincites
 zincked
 zincking
 zincky
-zinco
-zincoid
-zincos
-zincs
-zincum
-zincums
-zincy
 zineb
 zinebs
 zing
-zingani
-zingano
-zinganos
-zingara
-zingare
 zingari
 zingaro
-zingaros
 zinged
-zingel
-zingels
 zinger
 zingers
 zingier
@@ -251,15 +164,8 @@ zingiest
 zinging
 zings
 zingy
-zinkify
 zinnia
 zinnias
-zinober
-zinobers
-zinsang
-zinsangs
-zinziber
-zinzibers
 zip
 zipless
 zipped
@@ -274,10 +180,7 @@ zircon
 zirconate
 zirconates
 zirconia
-zirconias
-zirconic
 zirconium
-zirconiums
 zircons
 zit
 zither
@@ -285,75 +188,38 @@ zithern
 zitherns
 zithers
 ziti
-zitis
 zits
-zizel
-zizels
-zizit
 zizith
-zizz
-zizzed
-zizzes
-zizzing
-zizzle
-zizzled
-zizzles
-zizzling
-zlote
-zloties
 zloty
-zlotych
 zlotys
 zoaea
-zoaeae
 zoaeas
 zoaria
-zoarial
 zoarium
 zobo
-zobos
-zobus
-zocco
-zoccolo
-zoccolos
-zocco
-zocs
 zodiac
 zodiacal
 zodiacs
 zoea
 zoeae
 zoeal
-zoeas
-zoecia
-zoecial
 zoetic
 zoftig
 zoic
 zoisite
 zoisites
-zoism
-zoisms
-zoist
-zoistic
-zoists
 zokor
 zokors
-zolle
-zombi
 zombie
 zombies
 zombify
 zombiism
-zombiisms
-zombis
 zona
 zonae
 zonal
 zonally
 zonary
 zonate
-zonated
 zone
 zoned
 zoneless
@@ -374,36 +240,22 @@ zonular
 zonulas
 zonule
 zonules
-zonure
-zonures
 zoo
 zoochore
 zoochores
-zoocyst
-zoocysts
 zooecia
 zooecium
 zoogamete
 zoogametes
 zoogenic
-zoogenies
-zoogenous
-zoogeny
 zoogeographer
 zoogeographers
 zoogeographic
 zoogeographical
 zoogeographies
 zoogeography
-zooglea
-zoogleae
 zoogleal
-zoogleas
-zoogloea
-zoogloeae
 zoogloeal
-zoogloeas
-zoogony
 zooid
 zooidal
 zooids
@@ -413,10 +265,7 @@ zookeepers
 zookeeping
 zoolater
 zoolaters
-zoolatries
 zoolatry
-zoologer
-zoologers
 zoologic
 zoological
 zoologies
@@ -425,142 +274,82 @@ zoologists
 zoology
 zoom
 zoomania
-zoomanias
-zoomas
 zoomed
 zoometry
 zooming
 zoomorphic
 zoomorphism
-zoomorphisms
 zooms
 zoon
-zoonal
 zoonic
-zoonite
-zoonites
-zoonomia
-zoonomias
 zoonoses
 zoonosis
 zoonotic
-zoons
 zooparasite
 zooparasites
 zoopathies
 zoopathy
 zoopery
-zoophore
-zoophores
-zoophori
 zoophoric
-zoophorous
 zoophyte
 zoophytes
 zoophytic
 zooplankton
 zooplanktons
-zooplasty
 zoos
 zoosperm
 zoosperms
 zoospore
 zoospores
-zoosporic
-zootaxy
 zootechnics
 zootechnies
 zootechny
-zootic
-zootier
-zootiest
 zootomy
 zootoxic
 zootoxin
 zootoxins
-zooty
 zooxanthella
 zooxanthellae
-zorgite
-zorgites
-zoril
-zorilla
-zorillas
 zorille
 zorilles
 zorillo
 zorillos
-zorils
 zoris
 zorro
-zorroes
 zorros
 zoster
 zosters
 zouave
 zouaves
 zowie
-zowt
 zoysia
-zoysias
 zucchetto
 zucchettos
-zuffolo
-zuffolos
-zufolo
-zufolos
 zugzwang
 zugzwangs
-zuisin
-zuisins
 zukes
-zulus
-zumatic
-zunian
 zunyite
 zunyites
-zupan
 zupas
 zuppa
-zuppas
-zurich
-zurlite
-zurlites
-zuz
-zuzim
 zwieback
 zwiebacks
-zwitter
 zwitterion
 zwitterions
-zwitters
 zydeco
-zydecos
-zygadenine
-zygadenines
-zygantra
-zygantrum
 zygapophyses
 zygapophysis
 zygenid
 zygenids
-zygite
-zygites
-zygo
 zygodactyl
 zygodactyls
-zygoid
 zygoma
 zygomas
-zygomata
 zygomatic
 zygon
-zygose
 zygoses
 zygosities
 zygosity
-zygosperm
-zygosperms
 zygospore
 zygospores
 zygote
@@ -568,16 +357,10 @@ zygotes
 zygotic
 zygotically
 zygotene
-zygotenes
 zymase
-zymases
 zyme
 zymes
 zymic
-zymin
-zymins
-zymite
-zymites
 zymogen
 zymogene
 zymogenes
@@ -585,32 +368,18 @@ zymogenic
 zymogens
 zymogram
 zymograms
-zymoid
 zymologic
 zymological
-zymologies
 zymologist
 zymologists
 zymology
-zymolysis
 zymolytic
 zymometer
 zymometers
-zymoplastic
 zymosan
 zymosans
-zymoscope
-zymoscopes
-zymoses
-zymosis
 zymotic
-zymotically
 zymotics
 zymurgy
-zyrenian
-zyrian
-zyryan
-zythem
-zytom
 zyzzyva
-zyzzyvas
\ No newline at end of file
+zyzzyvas