There are 21 8-letter words that start with 'sid'.
| siddurim | sidearms | sideband | sidebars | 
| sidecars | sidehill | sidekick | sideline | 
| sideling | sidelong | sidereal | siderite | 
| sideshow | sideslip | sidespin | sidestep | 
| sidewalk | sidewall | sideward | sideways | 
| sidewise | |||
Note: These 21 8-letter words that start with 'sid' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words start with side, sidl, sidd, sidh, sidi.
4-letter words start with 'sid' (2)