Ecosystems rhymes with:
argosystems, biosystems, microsystems', argosystems, biosystems, cablesystems, microsystems', subsystems, techsystems, ultrasystems
Ecosystems sounds like:
eighteen's, eighteens, ejecting, equating, equations, esteem's, estonians, exacting, exactions, exceeding, exciting, executing, executions, exhausting, existence, existing, exiting, extinguish, exuding