Thesis
Theory
Theater
Thermometer
Then
Them
They
There
Their
Words beginning with 'dec' are:decadedecalDecemberdecidedecibeldecimaldecimatedeclaredecodedecreasedecrepitdecry
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.
Words beginning with the letter A that have ghostly meanings include:apparitionapparitions
Positive words beginning with 'n' include:nicenobleneatnourishingnurturing
You can start the beginning of a essay with the words, 'the, what, our, you and it.' Try not to start you beginning paragraph with words like 'and, but, and because.'
Some positive words beginning with M are:melodiousmerrymildMargaritamannerlymommymagneticmemoriesmassagemellowmanageablemarigolds
Some words beginning with 'sub' are:subjectsublimesubmitsubmarinesubletsubterraneansubmersesubsistsubservientsubduesubliminalsubmerge
Words beginning wth M and ending with ING:makingmanagingmarchingmarkingmeaningmeltingmemorizingmentioningmentoringmigratingmissingmixingmovingmunching
four letter words beginning wih d are: Dart
Some words beginning with "xi" include xiphoid, xiphosuran, and xiphias.
Some three letter words beginning with D are:diddogdoediedendindabduodotdigdrydye
Some five letter words beginning with F are:favorfirstfaithfilthfloorflameflukeframefrailforgefurorflood