1) Anon 2) Anysecond 3) In a sec 4) In a second 5) Momently 6) Soon 1) Any second now 2) At any moment 3) For a moment 4) For an instant 5) For an instant or moment 6) Instantly 7) Momently 
• (adv.) Every moment; from moment to moment.
Mo'men·ta·ri·ly adverb Every moment; from moment to moment. Shenstone. 
[adv] - for an instant or moment 2. [adv] - at any moment
in a moment adverb at any moment; `she will be with you momently`
As you come into land at an American airport and the announcement says that you will be landing momentarily, look around to see if anyone is sniggering. That will be the Brits! I never did figure out why they say this. Momentarily to us means that something will only happen for an instant
for a moment; briefly: to pause momentarily. · at any moment; imminently: expected to occur momentarily. · instantly.