Following are all the grownup like words, in the list below.
ADULT
100% like grownup
FULL-GROWN
100% like grownup
MATURE
100% like grownup
BIG
99.94% like grownup
GROWN
99.42% like grownup
FULLY GROWN
75.03% like grownup
GROWN-UP
75.03% like grownup
ADULTHOOD
75.03% like grownup
MANHOOD
75% like grownup
PRECOCIOUS
74.88% like grownup
TYKE
50.06% like grownup
YOUNGSTER
50.06% like grownup
ADOLESCENT
50.06% like grownup
ADULTS
50.06% like grownup
TYKES
50.06% like grownup
YOUNGSTERS
50.06% like grownup
KIDS
50.06% like grownup
TODDLER
50.06% like grownup
KIDDO
50.06% like grownup
TEENAGER
50.06% like grownup
BABYISH
50.06% like grownup
CHILD
50.06% like grownup
FOGEYS
50.06% like grownup
YOUNKER
50.06% like grownup
TEENAGED
50.06% like grownup
OLDSTERS
50.06% like grownup
PARENT
50.06% like grownup
TEENAGE
50.06% like grownup
STRAIGHTLACED
50.06% like grownup
YOUTHFUL
50.06% like grownup
ADULTNESS
50.06% like grownup
KIDDIE
50.06% like grownup
WHIPPERSNAPPER
50.06% like grownup
ADULTLIKE
50.06% like grownup
PLAYACTING
50.06% like grownup
TEEN
50.06% like grownup
LITTLER
50.06% like grownup
PLAYACT
50.06% like grownup
TWENTYSOMETHING
50.06% like grownup
YOUNG
50.06% like grownup
KIDDY
50.06% like grownup
SCHOOLBOYISH
50.06% like grownup
YOUNGER
50.06% like grownup
TWEEN
50.06% like grownup
JUVENILE
50.06% like grownup
CHILDLIKE
50.06% like grownup
TEENAGERS
50.06% like grownup
CHILDREN
50.06% like grownup
GIRL
50.06% like grownup
PRETEEN
50.06% like grownup
BOYLIKE
50.06% like grownup
GIRLIE
50.06% like grownup
PLAYMATE
50.06% like grownup
COMPEER
50.06% like grownup
GENITOR
50.06% like grownup
PRESCHOOLER
50.06% like grownup
PREPUBESCENT
50.06% like grownup
YOUNGISH
50.06% like grownup
TEENYBOPPER
50.06% like grownup
GIRLISH
50.06% like grownup
BITTIE
50.06% like grownup
PUBESCENT
50.06% like grownup
PARENTING
50.06% like grownup
METTLESOME
50.06% like grownup
GRANDADDY
50.06% like grownup
GRANNIE
50.06% like grownup
NURSEY
50.06% like grownup
GRAMPAPPY
50.06% like grownup
GRAND-DADDY
50.06% like grownup
YOUNGEN
50.06% like grownup
GIRLBOY
50.06% like grownup
YOUNGUN
50.06% like grownup
PUPPY-DOG
50.06% like grownup
BABYGROW
50.06% like grownup
BABYDOLL
50.06% like grownup
GRRL
50.06% like grownup
KID-DOM
50.06% like grownup
MAMMIE
50.06% like grownup
UNKIE
50.06% like grownup
NURSY
50.06% like grownup
COLOURED
50.06% like grownup
CHILLUNS
50.06% like grownup
DADDA
50.06% like grownup
GREYHEAD
50.06% like grownup
LUNCHOR
50.06% like grownup
TADDIE
50.06% like grownup
BABY-FARMER
50.06% like grownup
ALTER KOCKER
50.06% like grownup
TOUGH TOOSHIE
50.06% like grownup
OLDWIFE
50.06% like grownup
KIDDAW
50.06% like grownup
DIDY
50.06% like grownup
GOSSIPPER
50.06% like grownup
DADDIKINS
50.06% like grownup
WHITE BOY
50.06% like grownup
LADDY
50.06% like grownup
POOPIE
50.06% like grownup
DOLLIE
50.06% like grownup
CUTEY
50.06% like grownup
YOUNGON
50.06% like grownup