wisdom, wīsdōm ([§ 26]).
wise, wīs ([§ 80]).
with, mid ([§ 94, (1)]);
to fight with (= against), gefeohtan wið ([§ 94, (3)]).
withstand, wiðstǫndan (with dative) ([§ 116]).
wolf, wulf ([§ 26]), wylf ([§ 38]).
woman, wīf ([§ 32]).
word, word ([§ 32]).
worm, wyrm ([§ 45]).