subletting

sublicensing

sublimating

subliming

submarining

submerging

submersing

submitting

suboptimizing

subordinating

suborning

subpenaing

subpoenaing

subring

subrogating

subsampling

subscribing

subserving

subsiding

subsidising

subsidizing

subsisting

subsoiling

subspecializing

substantiating

substantivizing

substituting

subsuming

subtending

subtilizing

subtitling

subtotaling

subtotalling

subtracting

subtweeting

suburbanising

suburbanizing

subvening

subverting

subvocalizing

subwaying

succeeding

succoring

succouring

succumbing

succussing

suckering

sucking

suckling

suctioning