WordNet sense 1 (a rapid series of short loud sounds (as might be heard with a stethoscope in some types of respiratory disorders)):

rattle, rale

WordNet sense 2 (extraordinarily good; used especially as intensifiers):

fantastic, grand, howling, marvelous, terrific, tremendous, wonderful, wondrous, marvellous

WordNet sense 3 (beyond what is ordinary or usual; highly unusual or exceptional or remarkable):

extraordinary

WordNet sense 4 (quick and energetic):

brisk, lively, merry, snappy, spanking, zippy

WordNet sense 5 (possessing or exerting or displaying energy):

energetic

WordNet sense 6 (used as intensifiers; `real' is sometimes used informally for `really'; `rattling' is informal):

real, really, very, real, real