mature, maturate, grow -- (develop and reach maturity; undergo maturation; "He matured fast"; "The child grew fast")
senesce, age, get on, mature, maturate -- (grow old or older; "She aged gracefully"; "we age every day--what a depressing thought!"; "Young men senesce")
fester, maturate, suppurate -- (ripen and generate pus; "her wounds are festering")