Linseed rhymes with:
cottonseed, aniseed, appleseed, cottonseed, flaxseed, oilseed, rapeseed, airspeed, aniseed, appleseed, ashmead, centipede, certainteed, cottonseed, duckweed, fireweed, flaxseed, ganymede, goodspeed, highspeed, inbreed, krumwiede, lockheed, milkweed, nobody'd, nosebleed, oilseed, pitied, pokeweed, proofread, ragweed, rapeseed, rosemead, seaweed, siegfried, windspeed
Linseed sounds like:
lamaist, lanai-city, lancet, lancit, lanctot, langguth, langseth, languid, languished, lanzet, launched, leanest, length, lengthy, leninist, linguist, linked, linquist, linscott, lionized, longed, longest, longitude, longshot, longuet, longwood, lunched, lunged, lynched