Lamppost rhymes with:
bundespost, goalpost, guidepost, outpost, signpost, sternpost, almost, amerihost, anteriormost, bundespost, cohost, foremost, goalpost, guidepost, innermost, northernmost, outermost, outpost, overdosed, pancoast, seacoast, signpost, southernmost, sternpost, suncoast, uppermost, utmost, westcoast, westernmost
Lamppost sounds like:
lambaste, lambasted, lymphocyte