30 Synonyms Antonyms of SPEARHEAD MerriamWebsterSynonym words for initiating include guiding, trailblazing, promoting, taking the lead in, being the vanguard of, igniting, instigating, fostering as well as marking the dawn of. Synonyms to synonym involve equivalent and thesaurus entry. Content optimized for the keyword spearheading synonym can be developed to attract and retain readers.