2 letters:
ct

3 letters:
mor, ort

4 letters:
bort, cort, dort, fort, gort, kort, malt, mart, mohr, mora, mord, more, mori, mork, moro, morr, mory, ohrt, port, sort, tort, wart

5 letters:
boart, corte, court, foret, korte, mahrt, marte, mault, maura, mauri, mauro, maury, maust, maute, mor's, moret, morey, morph, morra, morro, morry, morse, morss, morty, morze, mourn, mowry, norte, porte, short, torte

6 letters:
maurer, maurie, moerbe, moerke, morgue, morrie, morsch, mortar, morter, mortie, mourer, mowrer, mowrey, shortt