encumbrance vs headache

encumbrance and headache both are nouns.

Word	Noun	Adjective	Verb	Adverb
encumbrance	Yes	No	No	No
headache	Yes	No	No	No

As nouns, headache is a hypernym of encumbrance; that is, headache is a word with a broader meaning than encumbrance:

Other hypernyms of encumbrance include concern, vexation, worry.

encumbrance (noun)	headache (noun)
any obstruction that impedes or is burdensome	something or someone that causes anxiety; a source of unhappiness
an onerous or difficult concern	pain in the head caused by dilation of cerebral arteries or muscle contractions or a reaction to drugs
a charge against property (as a lien or mortgage)