Letter (B) is not pronounced when following (M) at the end of a word.
Climb
Crumb
Dumb
Comb
Bomb

Letter (C) is not pronounced when following (S).
Science
Scene
Scientific
Scientist
Scion (a young member of a rich and famous family).

Letter (D) is not pronounced in the following common words: Handkerchief
Wednesday
Bridge
Wedge (a piece of metal, wood, rubber, etc).

Letter (E) is not pronounced at the end of words and usually makes the vowel long. Hope
Drive
Gave
Write
Side

Letter (G) is often not pronounced when followed by an (N).Champagne
Foreign
Sign
Feign (to pretend to feel something, usually an emotion, to nag).

Letter (GH) is not pronounced before (T) and at the end of many words.Thought
Through
Daughter
Light
Might
Right
Dough
Weigh

Letter (H) is not pronounced when following (W).
What
When
Where
Whether
Why

Letter (H) is not pronounced at the beginning of many words.
Hour
Honest
Honor
Heir
Herb (a type of plant whose leaves are used in making medicine).

Letter (H) is pronounced at the beginning of these common words.
Hill
History
Height
Happy
Hangover (a feeling of illness after drinking too much alcohol).

Letter (K) is not pronounced when followed by (N) at the beginning of a word.
Knife
Knee
Know
Knock
Knowledge
Knew

Letter (L) is often not pronounced before (D, F, M, and K).
Calm
Half
Should
Talk
Would
Balk
Salmon

Letter (N) is not pronounced following (M) at the end of a word.
Autumn
Hymn (religious song).
Solemn ( serious and without any amusement).

Letter (P) is not pronounced following letter (S, N).
Psychology
Pneumonia
Psalter
Pneumatic (operated by air pressure).
Psychotherapy (the treatment of mental illness by discussing the problems which caused it with the sufferer, instead of using drugs or operations).

Letter (S) is not pronounced before (L) in the following words.
Island
Isle
Aisle

Letter (T) is not pronounced in these common words.
Castle
Christmas
Fasten
Listen
Often
Whistle

Letter (U) is not pronounced following (G) and before a vowel.
Guess
Guidance
Guitar
Guest

Letter (W) is not pronounced at the beginning of a word followed by an (R).
Wrap
Write
Wrong
Wreckage

Letter (W) is not pronounced with these three pronouns.
Who
Whose
Whom

I hope the abovementioned information is enough.....

Thank you very much