Synonyms of fill-in

fill-in 1 of 2

noun

ˈfil-ˌin 

as in substitute

a person or thing that takes the place of another

I'm just a fill-in, so I have no idea where office supplies are kept

Synonyms & Similar Words

• substitute
• replacement
• backup
• stand-in
• assistant
• surrogate
• relief
• sub
• cover
• reserve
• alternate
• locum tenens
• pinch hitter
• proxy
• designated hitter
• deputy
• delegate
• stopgap
• second
• makeshift
• apology
• factor
• agent
• representative
• attorney
• understudy
• assignee
• rep
• successor
• commissary
• envoy
• procurator
• reliever
• superseder

fill in

2 of 2

verb

1

as in to inform

to give information to

my friend quickly filled me in on the portion of the movie that I had missed

Synonyms & Similar Words

• inform
• tell
• advise
• catch up
• instruct
• brief
• teach
• educate
• clue (in)
• hip
• familiarize
• enlighten
• keep (someone) posted
• verse
• apprise
• wise (up)
• let someone know
• clear
• acquaint
• notify
• alert
• disclose (to)
• announce (to)
• advertise
• convince
• lecture
• assure
• reassure
• certify
• school
• warrant
• tutor
• undeceive
• disabuse
• disillusion
• disenchant

Antonyms & Near Antonyms

• mislead
• misinform

2

as in to substitute

to serve as a replacement usually for a time only

she's only filling in while the regular secretary is on vacation

Synonyms & Similar Words

• substitute
• stand in
• take over
• step in
• cover
• spell
• sub
• pinch-hit
• double (as)
• relieve
• understudy

Examples of fill-in in a Sentence

Recent Examples on the Web

Noun

On the talk show's final episode of the season, fill-in moderator Behar introduced a discussion about menopause with special guests Michelle Jacobs and Sally Mueller, who founded the wellness brand Womaness. —EW.com, 2 Aug. 2024

Mekari can play anywhere along the line, which is one of the reasons the Ravens would prefer to keep him in his usual rotational fill-in role. —Brian Wacker, Baltimore Sun, 21 July 2024

Verb

It's become smaller and thinner, but there are places like Mississippi Today, which is a startup, a nonprofit organization recently founded to fill in the gaps. —Dana Taylor, USA TODAY, 23 Sep. 2024

Substitute keeper Inaki Pena will fill in for Ter Stegen as Hansi Flick's side face Bayern Munich in the Champions League next month and defending champions Real Madrid in LaLiga. —Reuters, 23 Sep. 2024