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.
gramas grammas grams grammes crams gorms gouramis creams grooms karmas kormas gouramies grimes grumes grimace crambos grumose crambes grumous cramboes gremmies cramoisy corms cramoisie caroms cremes crimes crumbs kermis kermes kirmess carroms cormous kermess curiums corymbs quorums crummies kermesse
gramas taramas dioramas dramas zirams uraemias grammas rearms arms crams gouramis reams ihrams rumbas marrams choriambs warms aromas prams paramos rams brahmas marimbas roams harms dreams kormas trams arames viremias uremias breams frames forams dermas grams ramus jorams creams karmas traumas charms farms barms drams primas praams seriemas hyperemias dirams neuromas chromas
gram grama gramma gramme cram crambe crambo gorm gremmie gremmy grim grime grimy grum grume