suffer vs ache

suffer is not a noun while ache is a noun.

Word	Noun	Adjective	Verb	Adverb
suffer	No	No	Yes	No
ache	Yes	No	Yes	No

As verbs, suffer and ache are synonyms defined as:

Other synonyms of suffer include hurt.

suffer (noun)	ache (noun)
	a dull persistent (usually moderately intense) pain

suffer (verb)	ache (verb)
be in pain	have a desire for something or someone who is not present
undergo (as of injuries and illnesses)	be the source of pain
feel unwell or uncomfortable	feel physical pain
get worse in quality
be set at a disadvantage
put up with something or somebody unpleasant
experience (emotional) pain
feel physical pain
undergo or be subjected to
undergo or suffer
be given to