18-crown-6

noun 0.736

ethyl ether

noun 0.620

15-crown-5

noun 0.617

calixarene

noun 0.606

diethyl ether

noun 0.578

polyether

noun 0.570

crown

noun 0.563

diphenyl ether

noun 0.560

petroleum ether

noun 0.520

polyoxyethylene

noun 0.510

cyanoethyl

noun 0.508

epoxide

noun 0.507

triethylamine

noun 0.506

fullerene

noun 0.501

crown princess

noun 0.500