Dichromate rhymes with:
acclimate, amalgamate, automate, breakmate, checkmate, classmate, decimate, glucosamate, glutamate, inmate, multimate, overestimate, papermate, phonemate, playmate, primate, roommate, schoolmate, shipmate, shoemate, shumate, stalemate, teammate, underestimate, unimate
Dichromate sounds like:
degrand, dejarnett, dejarnette, diagrammed, disagreement, disarmament, disarmed, discerned, discernment, discriminate, discriminated, disorient, disoriented