Odd word pair: a thing and its count (sides, players), one count wrong

This type of question, asked 2 times: 9 Sep 2024 S1, 23 Sep 2024 S3. All 2 questions below, oldest first.

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Question 1
9 Sep 2024 S1
6 $The question contains pairs of words that are related to each other in a certain way. Three of the following four word pairs are alike as these have the same relationship and thus form a group. Which word pair is the one that DOES NOT belong to that group? (The words must be considered as meaningful English words and must not be related to each other based on the number of letters/number of consonants/vowels in the word.)$
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Question 2
23 Sep 2024 S3
11 $The question contains pairs of words that are related to each other in a certain way. Three of the following four word pairs are alike as these have the same relationship and thus form a group. Which word pair is the one that DOES NOT belong to that group? (The words must be considered as meaningful English words and must not be related to each other based on the number of letters/number of consonants/vowels in the word.)$
Tap an option to check your answer.

Question 1