people

Examples-

~ Spelling - demo  =  dem + vowel

demology - the study of people

head

Examples-

~ Spelling -  cephalo  =  cephal  +  vowel

cephalic - having to do with the head
cephalology - the study of the head

shape or structure

Examples-

~Spelling -  morpho  =  morph  +  vowel

morphic - having to do with the shape of something
zoomorphy – shape or structure of animals
anthropomorphism – belief in the structure of early man

center

Examples-

centricity - condition of being in the center
anthropocentrism - belief that early man is the center 

geocentrism - belief that the Earth is in the center of the universe

power

Examples-

psychodynamic (adj.) - having to do with the power of the mind
astrodynamic (adj.) - having to do with the power of the stars or space 

one

Examples-

unity – condition of being one
uniformity - condition of being one form             unicycle - vehicle having one wheel
unicorn - an animal having one horn

measuring

Examples-

sociometry - the measurement of relationships of living things
dynamometry - the measurement of power