More readily, anon, ahead of time, by preference, and from/by choice are all synonyms for soon. Late, belatedly, tardily, and slowly are antonyms of soon. And here are 49 another word for soon.
Anon, any day (now), any minute (now), any time (now), before long, before you know it, by and by, directly, in (less than) no time, in a jiffy, in a little while, in a minute, in a moment, in a short time, in a tick, in a twinkling, in an instant, in no time (at all), in the near future, in the twinkling of an eye, in two shakes of a lamb's tail, in two shakes, in two ticks, presently, pronto, sharpish, shortly, and ere long are all synonyms for soon.
Ahead of time, before, beforehand, by when, earlier, early, in advance, in readiness, promptly, punctually, quickly, speedily, and already are all another word for soon.
By preference, from/by choice, more readily, more willingly, preferably, rather, and if i had my druthers are all synonyms for soon.
Soon synonym page has a variety of synonyms that differ in length. 1 synonym with 4, 5, 14, 16, 21, and 23 letters and 4 synonyms with 6 letters. 5 synonyms with 7, 8, 9, 11, and 12 letters and 6 synonyms with 10 letters.
2 synonyms with 13, and 15 letters. For a total of 45 another word for soon.
Dinner will be ready soon, almost done.
She'll be home soon, just be patient.
The movie will start soon, don't worry.
I'll finish my homework soon, I promise.