A Plum tree.
Some 6 letter words with U as the third letter:abusedblurrybountybrunchblurtsboundschumpschurchcountycourtschurnscrustychummycrummychuckscrunchdrunksflurryfluentfourthgruntshourlymournsmoundspouredpoundsroundsscurrysoundsslurpssouredspurnssturdyshucksstuntsskunksstumpsscummytouredtruststrumpstrunkstruant
Uvilla is a fruit. It begins with the letter u.
Some seven letter words with the second letter A and the third letter U are:bauxitecausticcautiondauphinhaughtyhauntedhauteurlaundrymaudlinnaughtypaunchyraucousraunchysauntersausagevaulted
tree
Tree
A five letter word with the second letter U, third letter C, ending with S is MUCUS.
Some five letter words with U in the middle are:abuseazurebluntblurbblushbrushchurnchumpclumpcrushdauntdoubtdruidfluidfruitgourdgrumpgrunthaunthoundhousejoustlousemauvemousemouthplushpoundroughroundroutesaucesautesoundsouthtouchvouchyouth
Square ... although the third letter is 'u'
Click the letter 'U' in the third answer. (The letter U is shaped like a horseshoe).
saucepans, tautology
Umbrellatree
blurryblurtschurchchurnsflurryfourthhourlymournspouredscurryslurpssouredspurnssturdytoured