In the word start, the Maori English vowel is somewhat fronter, despite our general observation that BATH/START is backer than in Pakeha New Zealand English.

Similarly, diphthong shift of /au/ (the MOUTH vowel) involves a first element fronter than [A] or closer (higher) than [a], for example [kευ] cow; diphthong shift of /ei/ (the FACE vowel) has a first element more open (lower) than [e], as in [plɛɪs] place (cf. RP [pleɪs]); diphthong shift of /ou/ (the GOAT vowel) involves a first element fronter and/or more open (lower) than [o], for example /kɐʊt/ coat (cf. RP [kɵʊt]).

The full development is Quadrant 4 in which /e/ is fully reversed in relation to /ey/, both fronter and higher.

1947 October 11, The Billboard, Gov′t Checks Ork Disk $$$, page 20,
In the case of musicker′s salaries, the IR Department asks a recording band fronter to show if a fixed salary is guarantted to sideman, irrespective of the hours worked; […] .

Another point I'd like to bring up is the use of fronters. These are people who prospect for you.

By attending investment seminars or trade shows or dropping a business card off at a booth, you are sending a message that you are someone who is motivated to invest, which makes you more likely to say yes when the fronter calls on the phone.

Fronter

Meaning

Adj

Noun

Rhymes