Adamantiferous, etymologically correct, would never answer; but all except pedants or affectationists would be satisfied with diamond-producing.

Many high performance aircraft are equipped with a Machmeter for monitoring Mcrit. The Machmeter is essentially an airspeed instrument that is calibrated in relation to Mach on the dial.

These are called the pedocals and pedalfers. Pedalfers are humid-climate soils where leaching is dominant. The al and the fer in the pedalfer refer to the concentrations of aluminum and iron (ferum) that are found in the zone of illuviation.

It was suggested in 12.1 that propositional synonyms are 'more synonymous' than plesionyms, which, in turn, are 'more synonymous' than non-synonyms.