refrain (v.), refrain (s., in verse).
retort (reply), retort (chemical vessel).
second (number), second (of time).
squall (v.), squall (a gale).
slab (s.), slab (adj.).
smart (s. and v., sting), smart (adj.).
stave (of barrel), stave (of music), [stave in (v.)].
stick (s.), stick (v.).
stock (stone), stock (in trade), &c.
strut (a support), strut (to walk).