We don't have synonyms for tack weld yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are tack-weld, tick weed and jack wild.
(n) :
A small, isolated weld used to position and secure pieces of work (typically, in preparation for the final weld).
(v) :
(transitive, intransitive) To position and secure pieces of work using small welded joints at isolated points (typically, in preparation for the final weld).
(n) :
A small, isolated weld used to position and secure pieces of work (typically, in preparation for the final weld).
(v) :
(transitive, intransitive) To position and secure pieces of work using small welded joints at isolated points (typically, in preparation for the final weld).