indigo
Some colors that begin with M and end with A are magenta and magnolia.
Some words that end in O are:agoalsobanjobravadobravocockatoocombocommandocuriododumbodynamoechoergoflamingogizmogogoohalohelloheroigloointokangarookazookiddokilokimonolassoloomemonoontopatiopeekaboopianopotatoradiorhinorodeososolotattoototomatotootornadotorsotriotwountovetovideovirtuosowhowooyahooyo-yozerozoo
blue
There aren't many:fuchsiaaquabegoniamagentanyanzawistaria
Some objects that end with the letter O are:ammoavocadobamboobanjobistrobuffalocameocellocockatoocuckoodingodominoembryofoliofrescogauchogazebogumboherohippohoboigloojalapenokangarookazoolassolimomangomemonachoOreopalmettopatiopesopestophotopianopiccolopimentopintopistachioPlutoradiorhinosilotacotarotobaccotuxedovideovolcanoyo yozoo
Mexico
Some words ending in the vowel O are:bongobravohalohelloherojellopianopolopotatoshampoosilosolotattootomatoweirdozero
Some Scrabble words that end with O are:banjocockatoocombocommandocuriododominodumbodynamoechogizmogogoohalohelloherokangarookazookiddokilokimonomemonopatiopeekaboopotatoradiorodeosotattoototomatotootornadotorsotriovetovideovirtuosowhowooyahoozerozoo
Some four letter words that end with "o" are:zerohaloherohobointojudokiloalsoaltoautoechomemoontopolosilosolotacotarotrioundoveto
Olingo.
Oreo,
Some words that end in VO are:bravoparvooctavosalvo