Nepotism rhymes with:
despotism, astigmatism, conservatism, corporatism, despotism, dogmatism, egotism, electromagnetism, ergotism, ferromagnetism, helotism, hypnotism, magnetism, patriotism, pragmatism, rheumatism, separatism, stigmatism
despotism, astigmatism, conservatism, corporatism, despotism, dogmatism, egotism, electromagnetism, ergotism, ferromagnetism, helotism, hypnotism, magnetism, patriotism, pragmatism, rheumatism, separatism, stigmatism