All these are pronounced as:
Now, let’s look at the meaning:
ห้า : adjective – five (quantity)
ผู้หญิงห้าคน//phôo yĭng hâa khon – five women (take note of the use of classifier)
Credit pic: here
ห้าวันที่ผ่านมา ไม่มีวันไหนที่ฉันไม่คิดถึงเธอ
hâa wan thêe phàa maa, mâi mee wan năi thêe chăn mâi khíd thĕung ther
For the past five days, there is not a day that I don’t think of you.
ฮ่า : interjection – the sound of laughter
ฮ่าๆ
Credit pic: here
Due to this similarity in terms of pronunciation, we often find that Thais laugh as 555 over the Internet.