6-letter Words:
spring – sprigs
5-letter words
grins – rings- sings – pings – signs – snips – spins – sprig – grips
4-letter words
rigs – ring – sign – sing – sips – snip – spin – rips – pigs – grin – grip – nips – ping – pins
3-letter words
sir – sip – rig – pin – pig – nip –
2-letter words
in – is – pi