Perfect or near?
Night and light are perfect rhymes: the stressed vowel and ending sounds match. Love and rough are near rhymes: the vowel matches, but the ending changes. Try the words with your melody before choosing one.
Search by sound
The lookup uses the CMU Pronouncing Dictionary. It works with one English word at a time. Names, slang and pronunciations outside the dictionary may not appear, and results can sound different in your accent.