featherweight
[noun]
Synonyms: dunce, cluck, dimwit, dumb bunny, dumb cluck, lackwit, nitwit, pinhead, simp, wantwit
[adjective]
Synonyms: light, featherlight, imponderous, lightweight, unheavy, weightless

[TahlilGaran] English Synonym Dictionary ▲

feath‧er‧weight /ˈfeðəweɪt $ -ər-/ noun [countable]
a boxer who weighs less than 57.15 kilograms, and who is heavier than a bantamweight but lighter than a lightweight

[TahlilGaran] Dictionary of Contemporary English ▲