3 letters:
leo, lia

4 letters:
lash, leaf, leah, leak, leal, lean, leap, leas, leeb, leed, leek, leen, leep, lees, leet, lege, leib, leif, lein, lene, lepe, lesh, leve, li's, lieb, lief, liem, lien, lish, losh, lush

5 letters:
lasch, leach, leake, lease, leath, leave, lee's, leece, leech, leese, leete, leeth, leick, leise, leite, leith, lesch, liebe, liege, liese, losch, lusch, leash

6 letters:
heesch, lausch, lawshe, league, leetch, leitch, lersch, loesch, quiche, sheesh

7 letters:
leashed, loesche