Flagships rhymes with:
airships, ambassadorships, apprenticeships, battleships, chairmanships, championships, dealership's, dealerships, dictatorships, directorships, distributorships, econships, fellowships, governorships, gunships, internships, judgeships, leadership's, leaderships, lightships, memberships, partnership's, partnerships, professorships, proprietorships, receiverships, relationships, scholarships, spaceships, sponsorships, township's, warships
Flagships sounds like:
fellowships, flashback, flashbacks