Olika, unequal, different.

Olikhet, difference.

Oliv, olive.

Olja, oil.

Oljud, noise.

Ollon, acorn.

Oloflig, illicit, unlawful.

Olust, dislike, aversion, repugnance.

Olustig, low-spirited, drowsy.

Olycka, ill luck, misfortune, disaster, mischance.