Step-by-step explanation:
b:thumb,dumb,debt, climb,womb, limb, comb,tomb,womb and doubt
t:whistle,Christmas,fasten,ballet,buffet,castle,wrest
le,bristle,hustle
p:psychic, receipt, raspberry,coup, cupboard, psychology,psycho, pneumonia, pneumothorax,pseudo
g:gnome,gnarl,resign,assign,align,benign,sign,design,reign,foreign
n:column, autumn,solemn,hymn,