flutter, v. [tremble], palpitate; hover; [oscillate], [fluctuate], [vacillate], [waver].
flutter, n. tremor, [agitation], palpitation; [confusion], [disorder], [commotion].
fly, a. (Slang) [wide-awake], [knowing].
fly, v. [wing], soar, flit, [mount], hover; decamp, abscond, flee.
flyaway, a. [flighty], [giddy], [unrestrained], [volatile].
flying, a. awing, volant, volitant, soaring.
flying, n. aviation, [flight].
flying machine. aëroplane, aërodrome, biplane, monoplane. Associated words: hangar, aviator, aërodynamics, aviatrix.
foam, n. [froth], spume, spumescence.--v. [froth], spume.
foamy, a. [frothy], spumy.