A good word for happy is satisfactory,
Words that can be made with the letters in 'happy' are:aahhahaypapayya yap
Happy words are typically adjectives because they describe a person or thing as feeling joy or pleasure. They can also be used as adverbs to describe how an action is done, such as "She smiled happily."
Some words with the root word "happy" include happiness, happily, and unhappy.
Some of the words that can be made fro 'happy birthday' are:aadairariaaridartayebadbaitbatbathbaybidbirdbirthbraidbraydaydirthabithadhairhardharphathhayhidhiphithybridIiditpadpaidpairpartpartypatpathpaypippitpithpraypridepryrahraidraprayribridriptadtapthirdthytriadtriptryyapyardyay
The opposite of the word 'sad' is happy!
Some Christmas words that rhyme with happy are: joyfully
Some happy words that start with O include: Overjoyed Optimistic Open-hearted
Words that can be made form the letters in 'happy spring' are:aahairairyanangryanyapingasashaspgaingapgarishgarnishgasgashgaspgaygingnashgraingrainygraphgraspgraygrayishgringriphahaghairhairyhangharpharpingharpyhashasphayhayinghihiphippyhisIinisnagnapnarynaynighnipnippypapainpairpanpangpansyparparishparsnippaypayingpaysphasingphrasingpipigpinpingpipprayprayingpraysprigprypryingragrainrainyranrangraprappingrashraspraspingraspyrayrigringringripsagsangsapsappingsappysarisaysayingshagshapingsharingsharpshinshinyshipshysighsignsinsingsipsirsnagsnapsnappysnipsnippyspaspansparsparingspayspayingspinspinysprainsprangspraysprayingsprigspringyspryspyspyingyappingyarn
Here are a few words for happy:delightedjoyfulexuberantthrilled
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Words beginning with you are limited to forms of you, youth and young. If you mean "Happy words beginning with a U sound," perhaps you refer to euphoric.
The word happy can be separated out and rearranged to make several brand new words. Some of the words that can be made using the letters in happy are ha, pa, pap, pay, hay, and yap.