In the dictionary, each approved word has a specified part of speech. When you use an approved word, make sure that you only use it as that part of speech.

Examples:

The word “test” is an approved noun, but not an approved verb.

STE: Test B is an alternative to test A.

Non-STE: Test the system for leaks.

STE: Do the leak test of the system.

Do a test for leaks in the system.

The word “dim” is an approved adjective, but not an approved verb.

STE: The lamp comes on with a dim light.

Non-STE: Dim the lights.

STE: The lights in the cabin become dim.

There are some words (not many) that are approved as more than one part of speech. For example, the word “clean” is an approved verb but also an approved adjective. The position of the word in the sentence will tell you its function (and its meaning), because verbs and adjectives have different positions.

STE: Clean the inner surface of the container.

(“Clean” is a verb here.)

STE: Make sure that the area is clean.
(“Clean” is an adjective here.)

The word “acceptable” is an unapproved adjective. The dictionary gives an approved alternative that has the same part of speech. You can use that word to replace the unapproved word in the sentence (word-for-word replacement).

Non-STE: A value of 2 mm is acceptable.

STE: A value of 2 mm is permitted.

The word “operable” is an unapproved adjective. The dictionary gives an approved alternative that has a different part of speech (“operate” as a verb). Then, you must use a different sentence construction.

Non-STE: Make sure that the valve is operable.

STE: Make sure that the valve can operate.

If a word that you want to use is not in the dictionary, search for that word in an English dictionary and find which is the best synonym listed in the STE dictionary. Then, use the approved STE word.

When you replace a word, always make sure that the alternative you select does not change the meaning of the sentence. If the meaning changes, use a different construction.