Millisecond rhymes with:
nanosecond, nanosecond, arcand, awakened, beckoned, blackened, chickened, darkened, likened, nanosecond, quickened, reawakened, reckoned, second, sickened, slackened, thickened, weakened
Millisecond sounds like:
malignant, maligned, melicent, melisent, mellicent, milicent, milissent, millicent, millisent