headache

noun

head·​ache ˈhed-ˌāk 

1

: pain in the head

2

: a vexatious or baffling situation or problem

meetings had become a giant headache

—Franklin Foer

headachy adjective

or less commonly headachey

ˈhed-ˌā-kē 

Synonyms

• job
• killer
• burden
• effort

Examples of headache in a Sentence

I'm starting to get a headache.

The symptoms include fever and headache.

The city's biggest headache is traffic.

Managing your finances can be a real headache.

Recent Examples on the Web

Residents report constant running noses, headaches and sore throats. —Laura Paddison, CNN Money, 15 Aug. 2025

While the flu shot can cause redness and soreness at the injection site, as well as fever, muscle aches, headache and fatigue, FluMist can cause flu-like symptoms, including runny nose, congestion, sore throat, cough, fever, and muscle aches. —Alice Park, Time, 15 Aug. 2025

The illness can cause flu-like symptoms such as fever, chills, muscle aches, headaches, fatigue, loss of appetite, confusion or diarrhea. —David Matthews, New York Daily News, 14 Aug. 2025

Infected people will typically experience fever, chills, muscle aches, headaches and fatigue one to two weeks after having been bitten. —Fiona Bork, NBC news, 14 Aug. 2025

Word History

First Known Use

before the 12th century, in the meaning defined at sense 1

Phrases Containing headache

• cluster headache
• ice-cream headache
• pre-headache
• sick headache
• splitting headache
• tension headache

Rhymes for headache

• awake
• backache
• beefsteak
• betake
• cheesecake
• cupcake
• daybreak
• earthquake
• eastlake
• forsake
• handshake
• heartache

Video

An Abbreviated History of American English Spelling

Soop, wimmen, and headake did not make the cut

Kids Definition

headache

noun

head·​ache ˈhed-ˌāk 

1

: pain in the head

2

: an annoying or baffling situation or problem

headachy

-ˌā-kē 

adjective

Medical Definition

headache

noun

head·​ache ˈhed-ˌāk 

: pain in the head

called also cephalalgia

headachy

-ˌā-kē 

adjective