For emphasizing helping or aiding:
* -ance: assistance (noun)
* -ant: assistant (noun)
* -er: assister (noun - less common)
* -ive: assistive (adjective)
For emphasizing support or encouragement:
* -ive: supportive (adjective)
* -or: supporter (noun)
* -ing: supporting (verb - present participle)
For creating a related word:
* -ed: assisted (verb - past participle)
* -ing: assisting (verb - present participle)
* -er: assister (noun - less common)
Note: The suffix "-ance" is commonly used to form nouns related to actions or states, while "-ant" forms nouns referring to people or things that perform the action. The suffix "-ive" creates adjectives related to the noun.
Remember to choose the suffix that best fits the context and the intended meaning.