interval (n.)
- abeyance
- amount
- aperture
- breach
- break
- caesura
- caliber
- cavity
- cease-fire
- cessation
- chasm
- check
- clearing
- cleft
- comma
- compass
- crack
- cut
- day
- defalcation
- defect
- deficiency
- deficit
- degree
- delay
- diapason
- disclosure
- discontinuity
- distance
- downtime
- drop
- extent
- fenestra
- fifth
- fissure
- fistula
- fontanel
- foramen
- fourth
- gap
- gape
- gat
- grade
- gulf
- halftone
- height
- hesitation
- hiatus
- hole
- holiday
- hollow
- hour
- inlet
- instant
- interim
- interlude
- intermezzo
- intermission
- intermittence
- interregnum
- interruption
- interstice
- juncture
- lack
- lacuna
- lapse
- layoff
- leak
- leap
- letup
- level
- lull
- mark
- meantime
- meanwhile
- measure
- minute
- moment
- need
- notch
- note
- nuance
- octave
- omission
- opening
- orifice
- outage
- outlet
- parenthesis
- pas
- passageway
- pause
- peg
- period
- pitch
- plane
- plateau
- point
- pore
- proportion
- range
- ratio
- reach
- recess
- relief
- remission
- remove
- respite
- rest
- round
- rung
- scale
- scope
- season
- second
- semitone
- seventh
- shade
- shadow
- shortage
- sixth
- slot
- space
- span
- spell
- split
- stage
- stair
- stand-down
- standard
- stay
- step
- stint
- stoma
- stretch
- suspension
- third
- time
- tone
- tread
- truce
- ullage
- vacation
- void
- wait
- want
- while
- yawn
Lucid interval.