Due to the presence of ‘silent’ consonant letters

bomb

bɒm

climb

klaɪm

comb

kəʊm

crumb

krʌm

debt

det 

doubt

daʊt

dumb

dʌm

indict

ɪnˈdaɪt 

indictment

ɪnˈdaɪtmənt 

lamb

læm 

limb

lɪm 

numb

nʌm 

plumb

plʌm 

plumber

ˈplʌmə(r) 

subtle

ˈsʌtl 

thumb

θʌm

tomb

tuːm 

benign

bɪˈnaɪn

foreign

 ˈfɒrən 

gnat

næt 

gnaw

nɔː 

gneiss

naɪs

gnome

nəʊm

Gnostic

ˈnɒstɪk

gnu

nuː

phlegm

flem 

reign

reɪn 

slough

slaʊ 

exhaust

ɪɡˈzɔːst 

exhibit

ɪɡˈzɪbɪt 

exhilarate

ɪɡˈzɪləreɪt 

exhort

ɪɡˈzɔːt 

honest

ˈɒnɪst 

honour

ˈɒnə(r) 

honourable

ˈɒnərəbl 

prohibition

ˌprəʊɪˈbɪʃn

rhyme

 raɪm 

rhythm

 ˈrɪðəm 

spaghetti

spəˈɡeti

vehement

ˈviːəmənt

vehicle

ˈviːəkl 

whale

weɪl 

wheeze

wiːz 

whelp

welp 

whim

wɪm 

whine

waɪn 

whip

wɪp

whirl

wɜːl 

whisper

ˈwɪspə(r)

whist

wɪst 

whistle

ˈwɪsl 

borough

ˈbʌrə

dough

dəʊ 

drought

draʊt 

ghastly

 ˈɡɑːstli 

gherkin

ˈɡɜːkɪn

ghost

ɡəʊst 

naughty

ˈnɔːti 

neigh

neɪ 

neighbour

ˈneɪbə(r) 

nought

nɔːt 

ought

ɔːt 

plough

plaʊ 

sight

saɪt 

slaughter

ˈslɔːtə(r) 

sleigh

sleɪ 

sough

saʊ 

thorough

 ˈθʌrə

through

θruː 

weight

weɪt 

knack

næk

knave

neɪv 

knead

 niːd 

knee

niː 

kneel

niːl 

knob

nɒb 

knockout

 ˈnɒkaʊt

knot

nɒt 

almond

ˈɑːmənd 

almoner

 ˈɑːmənə(r) 

almonry

ˈɑːmənri

balm

bɑːm

calf

kɑːf

half

hɑːf 

palm

pɑːm

palmist

ˈpɑːmɪst

salmon

ˈsæmən

autumn

ˈɔːtəm

column

 ˈkɒləm 

hymn

hɪm

solemn

ˈsɒləm

coup

kuː 

corps

kɔː(r) 

cupboard

ˈkʌbəd 

psalm

sɑːm 

psalter

 ˈsɔːltə(r) 

psychiatrist

saɪˈkaɪətrɪst

psychic

ˈsaɪkɪk 

psychoanalyst

 ˌsaɪkəʊˈænəlɪst 

psychologist

saɪˈkɒlədʒɪst 

psychotherapy

ˌsaɪkəʊˈθerəpi 

sapphire

 ˈsæfaɪə(r) 

receipt

 rɪˈsiːt 

awe

ɔː

awful

 ˈɔːfl 

awkward

ˈɔːkwəd 

awl

 ɔːl 

knowledge

 ˈnɒlɪdʒ 

shawl

ʃɔːl 

whoop

 huːp

withdrawal

wɪðˈdrɔːəl 

wrath

rɒθ 

wren

ren

wrinkle

 ˈrɪŋkl 

wrist

rɪst 

wry

raɪ