Synonyms of underweight

1 Syllable
lank, thin, thins
2 Syllables
twiggy, skinny, shadow, lanker, starved, bony, scrawny, gangly, stringbean, skinnier, poler, thinnest, weedy, fleshless, puny, thinner, scrawnier
3 Syllables
angular, skeleton, twiglike, skin-and-bone
4 Syllables
anorectic, malnourished, skin-and-bones, undersized
5 Syllables
undernourished