backer

tukija, kannattaja One who, or that which, backVerb backs; especially one who backs an entrant in a contest.
puhekieltä (en-comparative of)
Martin J. Ball and Nicole Müller (2005), Phonetics for communication disorders, p. 174:

/eɪ/ This diphthong is a glide from mid front tongue position toward a higher, backer position similar to that of /ɪ/.