2
span(verb, fix, touch, join, stick)
2
speed up(expression, continue, boost, include, reply)
2
spread(verb, advance, increase, open, develop)
2
step up(verb, expression, phrasal verb, advance, increase)
2
stick(verb, hold, fix, cover, secure)
2
strengthen(verb, hold, advance, increase, develop)
2
suffix
2
supplement(verb, advance, increase, raise, rise)
2
synthesize(verb, meet, join, unite, combine)
2
team up with(verb, expression, idiom, phrasal verb, develop)
2
thicken(verb, advance, increase, open, develop)
2
throw in together(verb, expression, idiom, phrasal verb, meet)
2
tie(verb, hold, fix, cover, touch)
2
tie in(verb, expression, phrasal verb, fix, meet)
2
tie up(verb, expression, phrasal verb, hold, cover)
2
truss(verb, hold, cover, secure, restrain)
2
unify(verb, develop, secure, join, stick)
2
unite(verb, hold, fix, cover, meet)
2
wax(verb, advance, increase, open, develop)
2
wed(verb, fix, touch, join, stick)
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APASmart Define. (2015). tack on thesaurus. Retrieved September 24, 2026, from https://smartdefine.org/tack_on/thesaurus/synonyms
ChicagoSmart Define. 2015. "tack on thesaurus" https://smartdefine.org/tack_on/thesaurus/synonyms (accessed September 24, 2026).
HarvardSmart Define 2015, tack on thesaurus, Smart Define, viewed 24 September, 2026, <https://smartdefine.org/tack_on/thesaurus/synonyms>.
MLASmart Define. "tack on thesaurus" 10 April 2015. Web. 24 September 2026. <https://smartdefine.org/tack_on/thesaurus/synonyms>