Synonyms of headfirst

Adjective

1. headfirst, headlong, forward (vs. backward)

usage: with the head foremost; "a headfirst plunge down the stairs"; "a headlong dive into the pool"

Adverb

1. headlong, headfirst

usage: with the head foremost; "the runner slid headlong into third base"

Definition and meaning of headfirst (Dictionary)