yacht |jɑːt| — an expensive vessel propelled by sail or power and used for cruising or racing

yachting |ˈjɑːtɪŋ| — water travel for pleasure

yachtsman |ˈjɑːtsmən| — a person who owns or sails a yacht

yaffle |ˈjæfl| — (UK) the European green woodpecker, Picus viridis

yah |jɑː| — (UK, India, South Africa) Yes.

yahoo |ˈjɑːhuː| — a person who is not very intelligent or interested in culture

yak |jæk| — noisy talk

Yakut |jæˈkʊt| — a member of a Turkic people of northeastern Siberia (mainly in the Lena river basin)

yam |jæm| — edible tuber of any of several yams

yammer |ˈjæmə| — cry loudly, as of animals

yammerer  — One who complains or whines peevishly or whimperingly.

yammering |ˈjæmərɪŋ| — Present participle of yammer.

yank |jæŋk| — an American who lives in the North (especially during the American Civil War)

Yankee |ˈjæŋkɪ| — an American who lives in the North (especially during the American Civil War)

yap |jæp| — informal terms for the mouth

yard |jɑːrd| — a unit of length equal to 3 feet; defined as 91.44 centimeters; originally taken to be the average length of a stride

yard-arm |ˈjɑːdɑːm| — Alternative spelling of yardarm.

yard-bird |ˈjɑːdbɜːd| — Alternative form of yardbird.

yardage |ˈjɑːrdɪdʒ| — distance measured in the aggregate number of yards

yardarm |ˈjɑːrdɑːrm| — either end of the yard of a square-rigged ship

yardbird |ˈjɑːdbɜːd| — a military recruit who is assigned menial tasks

yardman |ˈjɑːdmən| — worker in a railway yard

yardmaster  — a railroad employer who is in charge of a railway yard

yardstick |ˈjɑːrdstɪk| — a measure or standard used for comparison

yardwand  — (archaic) A yardstick.

yarn |jɑːrn| — the act of giving an account describing incidents or a course of events

yarrow |ˈjærəʊ| — ubiquitous strong-scented mat-forming Eurasian herb of wasteland, hedgerow or pasture having narrow serrate leaves and small usually white florets; widely naturalized in North America

yashmak |ˈjæʃmæk| — the face veil worn by Muslim women

yatagan  — Alternative spelling of yataghan.

yataghan |ˈjatəɡan| — a long Turkish knife with a curved blade having a single edge

yaup  — emit long loud cries

yaw |jɔː| — an erratic deflection from an intended course

yawing |ˈjɔːɪŋ| — Present participle of yaw.

yawl |jɔːl| — a ship's small boat (usually rowed by 4 or 6 oars)

yawn |jɔːn| — an involuntary intake of breath through a wide open mouth; usually triggered by fatigue or boredom

yawner |ˈjɒnər| — a person who yawns

yawning |ˈjɒnɪŋ| — an involuntary intake of breath through a wide open mouth; usually triggered by fatigue or boredom

yawp |jɔːp| — make a raucous noise