Silvis rhymes with:
alvis, elvis, elvis', alvis, avis, bavis, bevis, chavis, chavis', chevis, chevys, clovis, divis, dravis, elvis, elvis', foodservice, havis, hovis, jervis, kendavis, kravis, lavis, levis, mavis, mervis, nankervis, navis, nevis, orvis, pendarvis, purvis, reavis, revis, sarvis, servis, serviss, tavis, tevis, travis
Silvis sounds like:
sailfish, salopek, salvage, salvaggio, salvas, salves, salvi's, salvos, salvucci, scallops, scalps, schlabach, schoolbook, schoolbooks, schoolboys, schoolbus, schulhaufs, schwalbach, seawolf's, seelbach, self's, selfish, selfs, selloffs, selvage, selvaggio, selves, selvig, shelby's, shellfish, shelves, silbaugh, silfies, silva's, silvas, silvius, slabaugh, slabs, slaps, slaves, slavic, slavick, slavik, slavish, slavs, slayback, slaybaugh, sleeps, sleeves, slifka, slifko, slippage, slips, slivka, slobs, slopes, slovacek, slovak, slovakia, slovakia's, slovaks, sloves, slowpoke, slupic, solves, solvig, syllabic, syllabus, sylvia's, sylvio's