OK. One of the most common silent letters is G when combined with N. Examples : GNAW, GNAT, GNOME. Crossword Clue Helper lists 121 GN,, words.
But that's not the biggest list. Merriam-Webster Scrabble lists:
Words That Start With KN: 233 Words | Scrabble® Word Finder
Words that start with KN: knap, knar, knee, knew, knit, knob, knop, knot, know, knur, etc.
Merriam-Webster Dictionary lists 387 words that start with KN
Knife, kneel, kneeling. knack. knackers, knackery, knead, knowledge, to name a few.