submergence (n.)
- baptism
- burial
- cadence
- catenary
- concavity
- de-escalation
- debasement
- decline
- degradation
- demotion
- depression
- descent
- diminution
- dip
- dipping
- displacement
- dive
- dousing
- draft
- droop
- duck
- ducking
- hollowness
- immersion
- inundation
- lapse
- lowering
- reduction
- sag
- sinking
- slump
- souse
- sousing
- submersion
- subsidence
- surfacing
- swag