Concatenates rhymes with:
procrastinates, alienates, carbonates, contaminates, discriminates, disseminates, dominates, eliminates, exterminates, fascinates, hydrogenates, hyphenates, illuminates, impersonates, marinates, nominates, originates, pollinates, predominates, procrastinates, resonates, subordinates
Concatenates sounds like:
constant's, constants, constituents, constituents'