Strengths is one. It also is one if the longest words of one syllable.
Laugharne's Scoughall's
Here are some possible words: anklebone brimstone cheekbone cortisone curbstone flagstone freestone gallstone hailstone headphone headstone homophone ironstone limestone lodestone megaphone methadone...
Birds, ranch, watch, frets, hawks, lawns, pills, mints, block, flats, chill, mills
strengths