Hydrox rhymes with:
airlocks, blackhawk's, blackhawks, boardwalks, cornstalks, echohawk's, gamecocks, goldilocks, mohawks, nighthawks, seahawks, sidewalks, skyhawks, tomahawks, toolbox
Hydrox sounds like:
haters, hatrick, hatteras, headdress, headdresses, headers, headrick, headwaters, heaters, heather's, heathers, heathrow's, hedrich, hedrick, heidrich, heidrick, heterosis, heterozygous, hetrick, hettrick, hitters, hooters, hydras, hydrick, hydro's, hydrous, hydroxy