Scientific's rhymes with:
scientifics, scientifics, scientifics, scientifics, scientifics, hieroglyphics, pacific's, scientifics, specifics, affix, alphagraphics, chemfix, datagraphix, demographics, geographic's, graphics, graphics', hieroglyphics, micrographics, pacific's, prefix, reprographics, scientifics, specifics, suffix, summagraphics, traffic's
Scientific's sounds like:
sandbag, sandbags, sandbox, sandvig, sandvik, santa-fe's, scientific, scientifics