triphthong /trifˈthong, tripˈ/

1. A combination of three vowel sounds in one syllable (phonetics)
2. (loosely) a trigraph

triphthongal /-thongˈgl/ adjective

• propeller-head
• propeller-heads
• propellers
• propeller shaft
• propeller shafts
• propelling
• propelling pencil
• propelling pencils
• propelment
• propelments
• propels
• propenal
• propend
• propended
• propendent
• propending
• propends
• propene
• propenes
• propenoic acid
• propense
• propensely
• propenseness
• propensenesses
• propension