Word 1: respectable (ri SPEK tuhbuhl)
Meaning 1: Decent or correct in character or behavior.
Example Sentence: She belongs to a respectable family.

Meaning 2: Fair in size or quantity.
Example Sentence: We collected a respectable amount for the charity.

Word 2: respectful (ri SPEKT fuhl)
Meaning: Marked by or showing respect or deference
Example Sentence: They listened to his lecture in respectful silence.

Word 3: respective (ri SPEK tiv)
Meaning: Belonging or relating separately to each of two or more people or things.
Example Sentence: After the movie, each of us went to our respective homes.

Example Sentence using all the words:
The students in deference to their respective respectable professors stood respectfully throughout the lecture.