In this one-word substitution question, choose the correct term for 'one who eats too much' and is habitually greedy about food.

Introduction / Context:
This vocabulary question focuses on one-word substitutions for specific types of people. Instead of the full phrase 'one who eats too much', English commonly uses a single noun to describe such a person. Questions like this are standard in competitive exams and improve your ability to read and write concisely and precisely about human behaviour and habits.

Given Data / Assumptions:
- Phrase to replace: 'one who eats too much'.
- Options: 'Impostor', 'Glutton', 'Hypochondriac', 'Intestate'.
- Exactly one option should describe a person habitually overeating or being excessively fond of food.
- We assume general dictionary meanings of these specialised nouns.

Concept / Approach:
The correct term for someone who eats excessively, often greedily and without self-control, is 'Glutton'. This word appears in both everyday speech and in moral or religious contexts. The other options describe very different types of people, such as someone pretending to be another person, someone overly worried about health or someone who dies without a valid will. To solve the question, you must match the exact behavioural feature—excessive eating—with the correct noun.

Step-by-Step Solution:
Step 1: Focus on the key idea: a person who habitually eats too much or is greedy about food. Step 2: Examine 'Impostor'. This is a person who pretends to be someone else to deceive others, not related to eating habits. Step 3: Examine 'Glutton'. This noun means a person who eats and drinks excessively or greedily. Step 4: Examine 'Hypochondriac'. This describes a person who is excessively anxious about their health and often imagines illnesses. Step 5: Examine 'Intestate'. This is a legal term describing someone who dies without leaving a valid will.

Verification / Alternative check:
Insert each option into a sample sentence: 'He is a man who eats too much.' becomes 'He is a glutton.' This sentence is natural and commonly used. 'He is an impostor' changes the meaning entirely and talks about deception. 'He is a hypochondriac' says he constantly worries about diseases, not food. 'He is intestate' is purely legal and refers to his status after death. Only 'Glutton' accurately captures overeating as a personal characteristic.

Why Other Options Are Wrong:
'Impostor' is wrong because it focuses on pretending and cheating, unrelated to diet. 'Hypochondriac' is wrong because it is about excessive concern with health. 'Intestate' is wrong because it refers to dying without a will, which has no connection with food habits. None of these relate to eating too much, so they cannot be used as substitutions for the given phrase.

Common Pitfalls:
Candidates sometimes pick words they recognise from legal or medical contexts just because they look technical. However, one-word substitution questions require precise matching of meaning, not just difficulty level. To build confidence, maintain a list of such person-related nouns—like 'glutton', 'miser', 'teetotaller', 'hypochondriac'—and periodically revise them with examples. That way, when you see 'one who eats too much', 'Glutton' will immediately come to mind.

Final Answer:
The correct one-word substitution for 'one who eats too much' is Glutton.