Homophones are words that sound the same but are spelled differently and have different meanings. While "tide" doesn't have a true homophone, there are a few words that sound *similar* depending on your accent:
* tied (past tense of "to tie") - This is the closest in pronunciation, but the "d" sound at the end is more distinct.
* typed (past tense of "to type") - This is also close but has a different vowel sound.
So, while there isn't a perfect homophone for "tide", these are the words that come closest in sound.