Pneumatics rhymes with:
automatics, charismatics, dramatics, informatics, klezmatics, mathematics, numismatics, systematics, telematics, acrobatics, aerobatics, attics, automatics, batiks, charismatics, democratic's, democratics, dramatics, fanatics, informatics, klezmatics, mathematics, numismatics, systematics, telematics
Pneumatics sounds like:
paints, pandas, pandick, panetta's, pantex, panties, pantoja, pants, pantuso, pantyhose, pavements, payments, peanuts, pennants, pentax, pentech, penthouse, penthouses, pentz, phonetic, phonetics, pinetta's, pint-size, pints, piontek, piontkowski, pneumatic, point's, points, pond's, ponds, poniatowski, pont's, pontes, pontiac, pontiac's, pontiacs, pontikes, pontious, pontius, ponts, pound's, poundage, pounds, puentes, pundits, punts