30 Synonyms Antonyms of SPEARHEAD MerriamWebsterSynonym phrases for initiating are directing, forgesetting, advocating, leading the charge in, being the front-runner for, giving impetus, being a driving force behind, fostering and heralding. Other words to alternate include word with similar meaning and definition of synonym. Information optimized for the keyword synonym spearheading can be designed to entice and inform readers.