Here is a list of the longest one consonant words I could find.
Note: 'Y' is accepted as a non-consonant only if it ends a syllable (e.g., 'hooey' & 'joey'

but not otherwise (e.g., 'deadeye'

.
B: BAOBAB C: ACACIA D: IODIDE F: FEOFFEE G: GAUGE H: HOOEY J: JOEY K: KOOKIE L: ALLELUIA M: MAMMAE N: NONUNION P: EPOPOEIA Q: QUEUE R: AURORAE S: OSSEOUS T: TATTOO V: EAVE W: AWEE X: IXIA Y: YOU Z: ZOEAE
can anyone improve on this list?
Art Neuendorffer