Assistants rhymes with:
constant's, constants, contestants, decongestants, protestants, accountant's, accountants, accountants', combatants, constant's, constants, consultant's, consultants, contestants, decongestants, disinfectants, incompetents, inhabitants, irritants, militants, mutants, noncombatants, patents, pollutants, protestants
Assistants sounds like:
accident's, accidents, asthmatic, asthmatics, astounds