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.
manila manilla manille manly mainly manual meanly menial moonily hymenial manually menially hymnal hymenal hymeneal
manila nil noil nill nala cannily canola quinela anil loonily hymenial anile manilla lunula penial pinnula rainily renail snail xenial zonula tawnily tinily toenail unnail moonily quiniela biennial onlay bonnily funnily phonily vanilla venial inlay finial genial cannula canula menial nail penile punily ranula senile sunnily zanily denial tenail tinnily unlay shinily
mania man amnia muni main mana mane manna mano many maun mawn mean meanie meany mini moan monie amain amnio