The letter H sometimes silent, sometimes not. For instance: heir, honest, hour.
-st ( silent ‘t’ after ‘s’)
listen, fasten
wr— (silent ‘w’ before ‘r’)
Write, wrap, wrist
Kn- (silent ‘k’ before ‘n’)
Knit, knew, knock
gn- (silent ‘g’ before ‘n’)
gnash, gmail, align, foreign
ps ( silent ‘p’ before ‘s’)
psychiatrist, psychic
-lm (silent ‘l’ before ‘m’)
almond, balm,calm
–mn (silent ’n’ after ‘m’)
Autumn, calm, thumb, tomb
–mb (silent ‘b’ after ‘m’)
bomb, numb, thumb, tomb