We don't have synonyms for triforce yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are tricorne, triform and triforia.
(n) :
A shape composed of three equilateral triangles arranged in such a manner that a fourth triangle of identical size, but pointing the opposite direction, could fit between them.
(v) :
(Internet slang) To post three Unicode triangles (▲) arranged in this configuration, especially on 4chan, where doing this correctly was a sign of experience used to weed out newbies.
(n) :
A shape composed of three equilateral triangles arranged in such a manner that a fourth triangle of identical size, but pointing the opposite direction, could fit between them.
(v) :
(Internet slang) To post three Unicode triangles (▲) arranged in this configuration, especially on 4chan, where doing this correctly was a sign of experience used to weed out newbies.