4
water(verb, thin)
3
clarify(verb, condense, extract, refine, infuse)
3
puff
3
reduce(verb, thin)
3
widen(verb, expansion)
2
blow up(verb, phrasal verb, expansion)
2
clean(condense, refine, purify)
2
cleanse(verb, condense, refine, purify)
2
cook(verb, thin)
2
diminish(verb, decline, reduce, fall, fail)
2
disperse(verb, decline, fall, fail, diminish)
2
emaciate(verb, thin)
2
irrigate(verb, thin)
2
trim(verb, thin)
2
water down(verb, thin)
1
abate(verb, decline, reduce, fall, fail)
1
add to
1
adulterate
1
aggrandise
1
augment
11 years ago|5.5k views|share |citing 
APASmart Define. (2015). rarefy thesaurus. Retrieved September 23, 2026, from https://smartdefine.org/rarefy/thesaurus/synonyms
ChicagoSmart Define. 2015. "rarefy thesaurus" https://smartdefine.org/rarefy/thesaurus/synonyms (accessed September 23, 2026).
HarvardSmart Define 2015, rarefy thesaurus, Smart Define, viewed 23 September, 2026, <https://smartdefine.org/rarefy/thesaurus/synonyms>.
MLASmart Define. "rarefy thesaurus" 10 April 2015. Web. 23 September 2026. <https://smartdefine.org/rarefy/thesaurus/synonyms>