Thematic rhymes with:
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, pneumatic, posttraumatic, pragmatic, prismatic, problematic, programmatic, psychosomatic, rheumatic, schematic, semiautomatic, sensormatic, symptomatic, systematic, telematic, traumatic, undiplomatic
Thematic sounds like:
taints, tandy's, taunts, teammates, tenant's, tenants, tenants', tends, tenements, tenets, tenths, tents, thometz, tints, tomatoes, tomatos, twenties, twenty's