Adjective foamy has 4 senses
- foamy, frothy - relating to or containing gas bubbles
Antonym:  solid (indirect, via liquid, gaseous)
Antonym:  liquid (indirect, via gaseous, solid)
 - bubbling, bubbly, foaming, foamy, frothy, effervescing - emitting or filled with bubbles as from carbonation or fermentation; "bubbling champagne"; "foamy (or frothy) beer"
Antonym:  noneffervescent (indirect, via effervescent)
 - foaming, foamy, frothing - producing or covered with lathery sweat or saliva from exhaustion or disease; "the rabid animal's frothing mouth"
Antonym:  healthy (indirect, via unhealthy)
 - bubbling, foaming, foamy, frothing, spumous, spumy, sudsy - covered with or resembling small bubbles as from being agitated by beating or heating; "the bubbling candy mixture"; "a cup of foaming cocoa"; "frothy milkshakes"; "frothy waves"; "spumy surf"
Antonym:  unagitated (indirect, via agitated)
 
,