Frederick's rhymes with:
fredericks, fredricks, fredericks, fredricks, dederichs, fredericks, fredricks, dederichs, deedrick's, fredericks, fredricks, friedrichs, hendricks, hendriks, hendrix, hendryx, kendricks, roderick's
Frederick's sounds like:
fortier's, fortress, fortresses, forwarders, frederic, frederica, frederick, fredericka, fredericks, frederico, frederika, fredric, fredrich, fredrick, fredricks, fridrich, friederich, friederike, friedrich, friedrichs, friedrick, furthers