Pneumatic rhymes with:
rheumatic, aromatic, asthmatic, asymptomatic, automatic, axiomatic, charismatic, cinematic, climatic, diagrammatic, diplomatic, dogmatic, dramatic, emblematic, enigmatic, enzymatic, epigrammatic, idiomatic, informatic, klezmatic, mathematic, matic, mattick, melodramatic, monochromatic, numismatic, phlegmatic, posttraumatic, pragmatic, prismatic, problematic, programmatic, psychosomatic, rheumatic, schematic, semiautomatic, sensormatic, symptomatic, systematic, telematic, thematic, traumatic, undiplomatic
Pneumatic 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, pneumatics, 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