Yes! But as a hyphenated word, "no-one."Can you omit the hyphen? No -- it might not be recognized. Would you write, "Noone will recognized this." It looks like the word "noon" with an exta "o".While...
There are many words actually examples are any and one which is anyone, fire and truck which is firetruck, car and pool which is carpool, yellow is one i never noticed until now which is yell and ow....