Can silver dollars live with kissing gouramis?

Verdict
Yes

Yes. Silver dollars and kissing gouramis get along in the same tank. Both are fine at 75–82°F. Plan on at least 75 gal.

Silver dollarSilver dollar75–82°F · pH 5–7 Kissing gouramiKissing gourami72–82°F · pH 6–8

Why it works

Water side by side

55°60°65°70°75°80°85°90°Both: 75–82°Silver dollar 75–82°Kissing gourami 72–82°
The green band is the temperature range both can live in.
456789Both: 6–7Silver dollar 5–7Kissing gourami 6–8
The green band is the pH both tolerate.

Size to scale

Silver dollar · 6 inKissing gourami · 10 in0"2"4"6"8"10"
Adult length in an aquarium. A fish can swallow anything that fits in its mouth, roughly a third to half its own length for predators.

Care at a glance

Silver dollarKissing gourami
Temperature75–82 °F72–82 °F
pH5–76–8
Adult size6.0 in10.0 in
Minimum tank75 gal55 gal
TemperamentPeacefulSemi-aggressive
Swims atMiddleMiddle
GroupGroups of 5+Alone or in pairs
DietHerbivoreOmnivore

Better tank mates for silver dollars

All silver dollar tank mates

Better tank mates for kissing gouramis

All kissing gourami tank mates

Questions

Can silver dollars live with kissing gouramis?

Yes. Silver dollars and kissing gouramis get along in the same tank. Both are fine at 75–82°F. Plan on at least 75 gal.

What temperature suits both silver dollars and kissing gouramis?

75–82 °F. Silver dollars need 75–82 °F, kissing gouramis need 72–82 °F.

What size tank do silver dollars and kissing gouramis need together?

At least 75 gal, set by the silver dollar. Add space for each extra fish.