Antonyms of adj roundheaded

1 sense of roundheaded

Sense 1
broad-headed, roundheaded, short-headed -- (having a brachycephalic head)

INDIRECT (VIA brachycephalic) -> dolichocephalic, dolichocranial, dolichocranic -- (having a relatively long head with a cephalic index of under 75)

Similarity of adj roundheaded

1 sense of roundheaded

Sense 1
broad-headed, roundheaded, short-headed -- (having a brachycephalic head)
       => brachycephalic (vs. dolichocephalic), brachycranial, brachycranic -- (having a short broad head with a cephalic index of over 80)