Reck, to notice, care about.
Reek, smoke rising from a fire, or spray and mist from a waterfall, e.g. "the reek of the falling flood;" "the heart of Fafnir ... sang among the reek."
Renown, fame, honour.
Rock-wall, mountain cliff.
Roof-tree, the topmost beam which forms the ridge of a roof.
Rue, to regret, to find a cause of woe.
Rumour, report, gossiping tale.
Rune, letter. The letters used in old Icelandic and similar languages are called runic characters. When written letters were first known in the north of Europe they were supposed to have magic powers, and gradually the word "rune" came to mean any spell, or even any wisdom which was beyond the ordinary knowledge of men.
Ruth, pity, regret, e.g. "Ruth arose in his heart;" "I have hearkened not nor heeded the words of thy fear and thy ruth."
Salutation, greeting.