vacuum valve vacuum tube rectifier • vacuum ventilation · · · Info · Synonyms · Characters · · vacuum valve · · Text Common · · Latin · · Scripts 12 · · Length Synonyms · · · vacuum · · Synonym 1 vacuity · · Synonym 2 void · · Synonym 3 vacancy · · Synonym 4 emptiness · · Synonym 5 vacuum cleaner · · Synonym 6 vacuum-clean · · Synonym 7 hoover · · Synonym 8 Characters · · space U+0020 a latin small letter a U+0061 c latin small letter c U+0063 e latin small letter e U+0065 l latin small letter l U+006C m latin small letter m U+006D u latin small letter u U+0075 v latin small letter v U+0076