Myofibril, composed of actin and myosin.

Contractile vacuoles are found in aquatic protists.They remove excess water.

An axostyle is a sheet of microtubules found in certain microbes, arising from the base of each flagella. It will sometimes be flexible or contractible, and provide support for the cell.

adhd isn't necessarily a "contractible" disease; it is a mental illness. it is not communicable, and most people who have it are born with it. however, some studies suggest that certain people can attain adhd-like symptoms from long term drug abuse.

commenceable, conscionable, contemptible, contaminable, communicable, correlatable, commerciable, controllable, counsellable, confoundable, concrescible, commemorable, contractible, commiserable, configurable, contemplable, complainable, contractable, contrastable, compressible, commoditable, consumptible, considerable, compoundable