False cognates are pairs of words that sound similar and that have a similar meaning but actually have different etymologies.
Japanese ありがとう (Pronunciation: arigatō)
English translation: thanks
English (to) occur
Japanese 起こる (Pronunciation: okoru)
Mandarin 弯 (Pronunciation: wān)
English round (object)
And lastly, the famous example of a false cognate between English and the extinct language of Mbabaram:
Do you know any other false cognates?