I've taken a list of English words, and examined each of them to see what they sound like (using the PHP metaphone function). This page lists the most common metaphone codes, along with their words. You can also search for a word of your own, and see which words sound similar - and which ones rhyme, and which ones alliterate.
litchis lichis liches laichs latches letches lichees lochs leches lyches laches leaches leeches loaches lychees lashes lushes leashes
litchis chis hatches hitches hoochies hotches itches cutches vichies ketches latches lichis matches letches nautches notches patches rachis retches wretches ditches tachs techs witches fitches fetches vetches etches chais butches botches bitches batches aitches quitches chias hootches hutches gotchas catches mutches nitchies pachisi pitches ratches rotches datchas duchies techies watches chichis
litchi lich laich latch letch lichee lichi flitch cliche glitch glitchy