- Xenographically Adv
- Xenophobically Adv
- Yarely Adv
- Yawningly Adv
- Year-round Adj Adv
- Yearningly Adv
- Yeastily Adv
- Yellowly Adv
- Yeomanly Adj Adv
- Yesterday Adv Noun
- Yesternight Noun Adv
- Yesteryear Noun Adv
- Yet Adv Conj
- Yieldingly Adv
- Yond Adj Adv
- Youthfully Adv
- YoY Adj Adv
- Zanily Adv
- Zealously Adv
- Zestfully Adv
- Zonally Adv
- Zoogeographically Adv
- Zoologically Adv