umlaut /ŭmˈlowt/

1. A vowel change in Germanic languages brought about by a vowel or semivowel (esp i or j, usu now lost) in the following syllable
2. The diacritical sign (¨), dots placed over a vowel, indicating such a modification

To modify (a vowel) with an umlaut

• zooplastic
• zooplasty
• zoopsychologies
• zoopsychology
• zoos
• zooscopic
• zooscopies
• zooscopy
• zoosperm
• zoospermatic
• zoospermium
• zoospermiums
• zoosperms
• zoosporangia
• zoosporangium
• zoospore
• zoospores
• zoosporic
• zoosporous
• zootaxies
• zootaxy
• zootechnics
• zootechnies
• zootechny
• zoothapses