synaeresis /sin-ēˈrə-sis/

1. The running together of two vowels into one or into a diphthong (phonetics)
2. The spontaneous expulsion of liquid from a gel (chem)

• sell-outs
• sells
• sell short
• sell smoke
• sell someone a bargain
• sell the pass
• sell through
• sell-through
• sell up
• sels
• seltzer
• seltzers
• seltzogene
• seltzogenes
• selva
• selvage
• selvaged
• selvagee
• selvagees
• selvages
• selvaging
• selvas
• selvedge
• selvedged
• selvedges