Geriatric rhymes with:
pediatric, psychiatric, fitzpatrick, hatrick, kilpatrick, kirkpatrick, patrick, pediatric, psychiatric, afrocentric, alphametric, anthropocentric, barometric, butrick, buttrick, citric, concentric, deatrick, deitrich, deitrick, detrich, detrick, dietrich, dietrick, dissymmetric, dittrich, dynalectric, eccentric, econometric, egocentric, electric, estrich, ethnocentric, fitzpatrick, gastric, geocentric, geometric, gilpatrick, gravimetric, hatrick, hetrick, hettrick, hydroelectric, kilpatrick, kirkpatrick, mckitrick, mckittrick, metric, metrick, nitric, obstetric, optometric, parametric, patrick, pediatric, petrich, petrick, petrik, photoelectric, piezoelectric, psychiatric, sitrick, smotrich, tantric, tetrick, theatric, vitric, westrich, westrick
Geriatric sounds like:
garters, geriatrics, girders, graders, grooters