4-letter words containing y, s
- sym- — syn-
- syn- — with or together
- sync — synchronization: The picture and the soundtrack were out of sync.
- syne — to rinse; wash out
- syph — syphilis (often preceded by the).
- sys- — syn-
- syst — system
- vysc — Vienna Youth Soccer Club
- ways — manner, mode, or fashion: a new way of looking at a matter; to reply in a polite way.
- wcys — Warren County Youth Soccer
- whys — Plural form of why.
- wsyl — West Surrey Youth League
- wyes — Plural form of wye.
- wyns — Plural form of wyn.
- wysc — Winchester Youth Soccer Club
- wyse — Archaic spelling of wise.
- wysl — Watertown Youth Soccer League
- xyst — A xystus.
- yahs — Plural form of yah.
- yaks — Plural form of yak.
- yams — Plural form of yam.
- yaps — Plural form of yap.
- yass — (US, dialectal) eye dialect of yes.
- yaws — one of the lesions of yaws.
- yeas — yes (used in affirmation or assent).
- yens — (colloquial, usually, Appalachian, also Midwestern US) You, you all; used in referring to a group that includes one's audience.
- yesk — a hiccup
- yest — Obsolete spelling of yeast.
- yets — Plural form of yet.
- yews — Plural form of yew.
- yins — Plural form of yin.
- yips — to bark sharply, as a young dog.
- ymsa — Yardley Makefield Soccer Association
- yobs — Plural form of yob.
- yods — Plural form of yod.
- yoks — a loud, hearty laugh.
- yosu — a city in S South Korea.
- yous — plural of you.
- yser — a river flowing from N France through NW Belgium into the North Sea: battles 1914–18. 55 miles (89 km) long.
- yuks — Plural form of yuk.
- ywis — certainly.