Gastric rhymes with:
estrich, westrich, westrick, 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, geocentric, geometric, geriatric, 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
Gastric sounds like:
gaidar's, gatherers, gathers, gators, gauthreaux, gautreaux, gestures, gethers, getters, godrej, gooders, goodrich, goodrich's, goodrick, goodyear's, guidroz, guitarro's, guitars, guiterrez, guitierrez, guthrie's, gutierez, gutierres, gutierrez, gutters