In summary, having a few purely coincidental similar words is extremely likely. In fact, if there were no such similarities that would be weirder, from a mathematical perspective… especially (but not necessarily) if you stretch what might be considered a “similar meaning”, which people often do.
In an extinct Australian Aboriginal language, Mbabaram, the word for "Dog" is almost exactly the same as the English word for "Dog". The similarity is a complete coincidence. (en.m.wikipedia.org)
…the Mbabaram word for “dog” was in fact dúg, pronounced almost identically to the Australian English word…