Barbecue's rhymes with:
barbecues, barbeques, barbecues, barbeques, barbecues, barbeques, barbecues, barbeques, barbecues, barbeques
Barbecue's sounds like:
barb's, barbakow, barbash, barbecue, barbecues, barbeque, barbeques, barbie's, barbies, barbosa, barboza, barbs, barfuss, barovic, barovsky, berbick, bierbusse, brabec, braves, braves', brebach, brevig, brevik, bribes, briefcase, briefcases, briefs, brobeck, brubeck, burbach, burback, burbage, burpees